Bem-vindo ao NeoToolkit

Kanban Board

Free online Kanban board for task management. Organize your work with To Do, In Progress, and Done columns. Auto-saves to your browser. No signup needed.

Fancy Text Generator

Convert normal text into stylish fancy fonts — bold, italic, cursive, gothic, bubble, and 20+ more styles. Perfect for social media bios, posts, and usernames.

AI Sentence Expander

Transform brief sentences and phrases into detailed, well-structured paragraphs. Choose an expansion style — descriptive, academic, storytelling, or persuasive — and get instant results. Free, fast, and completely private.

Online Calculator

Free online calculator for basic math operations. Add, subtract, multiply, divide with keyboard support. No ads, instant results, pure client-side.

Scientific Calculator

Free online scientific calculator with trigonometry, logarithms, exponents, factorials, roots & constants. DEG/RAD mode, calculation history, keyboard shortcuts. Pure client-side, instant results.

Weighted Average Calculator

Free online weighted average calculator. Calculate weighted averages with custom weights for grades, portfolios, and data analysis. Add unlimited values and weights. Pure client-side, no ads.

Rounding Calculator

Free online rounding calculator. Round numbers to nearest integer, decimal places, or significant figures. Supports round up, round down, and standard rounding rules. Instant, private, no ads.

Matrix Calculator

Free online matrix calculator for addition, subtraction, multiplication, transpose, determinant, and inverse. Supports 2×2 and 3×3 matrices with step-by-step solutions. No ads, instant results, pure client-side.

Right Triangle Calculator

Free online right triangle calculator. Enter any two sides to instantly find the third side, area, perimeter, and all angles using the Pythagorean theorem.

Trigonometry Calculator

Free online trigonometry calculator. Calculate sine, cosine, tangent, cotangent, secant, and cosecant for any angle in degrees or radians. Instant results with reference tables.

Barcode Generator

Create professional barcodes instantly in your browser. Supports CODE128, EAN-13, UPC-A, CODE39, ITF, and MSI formats. Download as PNG or SVG. 100% free and private.

Split Bill Calculator

Free online bill splitter. Split restaurant bills, rent, or shared expenses fairly with tax and tip. Calculate individual shares instantly. No signup needed.

HTML Formatter

Format, minify, and clean HTML instantly. Remove Word bloat, beautify with syntax highlighting. Pure client-side.

CSS Formatter

Format, minify, and beautify CSS instantly. Sort properties, fix indentation, syntax highlighting. Pure client-side.

CSS Minifier

Minify and compress your CSS code instantly. Remove whitespace, comments, and unnecessary characters for faster page loads. 100% client-side.

HTML Minifier

Minify and compress your HTML code instantly. Remove comments, whitespace, and unnecessary characters for faster page loads. 100% client-side.

JSON Minifier

Minify and compress your JSON code instantly. Remove whitespace, comments, and unnecessary characters while preserving string values. 100% client-side.

JavaScript Formatter

Format, beautify, and minify JavaScript code instantly. Syntax highlighting, proper indentation, and code compression. Pure client-side.

JS Minifier

Minify and compress your JavaScript code instantly. Remove whitespace, comments, and unnecessary characters for faster page loads. 100% client-side.

Code Playground

Live HTML/CSS/JS editor with instant preview. Write code and see results in real-time. Pure client-side, no data leaves your browser.

YouTube Thumbnail Downloader

Download YouTube video thumbnails in HD and all available qualities. Extract from any YouTube URL instantly. Pure client-side.

XML Formatter

Format, validate, and minify XML documents online. Pure client-side with syntax highlighting and structure analysis.

XML to JSON Converter

Convert XML documents to JSON and vice versa instantly. Supports attributes, namespaces, CDATA, and nested elements. Free, fast, and 100% client-side.

Markdown Editor

Write Markdown on the left, see live HTML preview on the right. Full syntax support — headings, lists, code blocks, tables, and more. Pure client-side.

HTML to Markdown Converter

Convert HTML code to clean Markdown format instantly in your browser. Free, private, no server upload. Supports headings, lists, tables, links, images, and code blocks.

Markdown to HTML Converter

Free online Markdown to HTML converter. Convert your Markdown files to clean HTML instantly in your browser. Supports headings, lists, links, images, code blocks, and tables.

Lorem Ipsum Generator

Generate classic Lorem Ipsum placeholder text instantly. Customize paragraphs, sentences, and words. Classic start or random. HTML or plain text. 100% client-side.

Random Paragraph Generator

Generate natural, readable English paragraphs instantly. Unlike Lorem Ipsum, this creates real sentences with nouns, verbs, and proper grammar. Perfect for realistic mockups, UI testing, and content placeholders. 100% client-side.

UUID Generator

Generate standard UUID v4 identifiers instantly. Create single or bulk UUIDs in multiple formats. Validate UUID format. 100% client-side, secure random generation.

Hash Generator

Compute MD5, SHA-1, SHA-256, and SHA-512 hashes for text or files instantly. 100% client-side — your data never leaves your device. Supports multiple algorithms, uppercase/lowercase output, and per-line hashing.

MD5 Hash Generator

Generate MD5 hashes for text or files instantly. 100% client-side — your data never leaves your device. Supports uppercase/lowercase output and per-line hashing.

Text Case Converter

Convert text between uppercase, lowercase, title case, camelCase, snake_case, and more. Instant, pure client-side.

Word & Character Counter

Free online word counter and character count tool. Get instant text statistics including word count, character count, reading time, keyword density analysis, and more. Perfect for writers, students, and SEO professionals.

Citation Generator

Generate perfectly formatted citations in APA, MLA, Chicago, and Harvard styles. Supports books, journals, websites, videos & more. Instant and 100% client-side.

Duplicate Line Remover

Instantly remove duplicate lines from your text. Keep first occurrence, keep last, or remove all duplicates. Pure client-side.

URL Encoder / Decoder

Encode and decode URLs instantly. Convert special characters to percent-encoded format and back. Pure client-side.

URL Parser

Parse and analyze any URL to extract protocol, domain, port, path, query parameters, and hash fragment. Perfect for debugging APIs, webhooks, and redirect chains.

Memorable Password Generator

Generate memorable passphrases using random word combinations. Easy to remember, hard to crack. 100% client-side — your passphrases never leave your browser.

PIN Generator

Generate secure random PIN codes instantly. Choose length (4–12 digits), quantity, and options. 100% client-side, your PINs never leave your browser.

Password Generator

Generate strong, secure passwords instantly. Customize length, character sets, and strength. 100% client-side, your passwords never leave your browser.

Password Strength Checker

Test your password strength instantly. Get entropy score, crack time estimate, and actionable tips to create stronger passwords. 100% client-side, your password never leaves your browser.

Random String Generator

Generate secure, customizable random strings for passwords, tokens, and test data. 100% client-side, instant generation.

Random Word Generator

Generate random words instantly for creative writing, brainstorming, word games, and password inspiration. Filter by category, starting letter, and word length. 100% client-side.

JSON Formatter

Format, validate, minify, and repair JSON instantly. Pure client-side with syntax highlighting and tree view.

CSV to JSON Converter

Convert CSV data to JSON format instantly in your browser. Free, private, no server upload. Supports custom delimiters and header options.

CSV to Excel Converter

Convert CSV data to Excel (.xlsx) format instantly in your browser. Free, private, no server upload. Supports custom delimiters and automatic data type detection.

JSON to CSV Converter

Convert JSON data to CSV format instantly in your browser. Free, private, no server upload. Supports nested object flattening and custom delimiters.

JSON to TypeScript

Convert JSON objects into TypeScript interfaces instantly. Pure client-side with smart type inference and nested object support.

Number Base Converter

Convert between Binary (2), Octal (8), Decimal (10), and Hexadecimal (16) instantly. Free, private, no server upload.

Date Duration Calculator

Calculate the exact number of days, months, and years between two dates. Includes workday count, date addition/subtraction, and countdown. Pure client-side.

Day of Week Calculator

Enter any date to instantly find out what day of the week it was — past, present, or future. Includes weekend check, day of year, week number, and zodiac sign.

Working Days Calculator

Calculate business days between two dates, excluding weekends and holidays. Also add or subtract working days from any date. Pure client-side.

Time Duration Calculator

Calculate the exact hours, minutes, and seconds between two times. Supports same-day, overnight, and multi-day calculations. Pure client-side.

Time From Now Calculator

Calculate what time it will be after any number of minutes, hours, days, or weeks. Supports past and future time calculations. Pure client-side.

Online Stopwatch

Free online stopwatch with lap times, pause/resume, and reset. Simple, accurate, and easy to use.

Pomodoro Timer

Free online Pomodoro timer with customizable work and break intervals. Track sessions, stay focused with the 25-5 technique. No signup needed.

Tiny Date Generator

Create trendy superscript and subscript dates (e.g., 🏝️ ²⁰²⁵/₁₀.₁₈ᵕ̈) for your social media bios and tweets.

Random Number Generator

Generate unique random numbers in bulk. Set range, count, and sort order. 100% free online tool.

List Randomizer

Shuffle any list randomly or pick a random subset. Supports line, comma, or space-separated items. Pure client-side.

Regex Tester & Validator

Test and validate regular expressions in real-time. Match highlighting, capture groups, replace preview, and common presets. Pure client-side.

Regex Visualizer

Visualize and understand any regular expression. See the structure, explanation of each token, and interactive examples. Pure client-side.

Resume Builder

Build a professional resume in minutes. Fill in your details, choose a template, and download a print-ready PDF. No signup required, 100% private.

Cover Letter Generator

Generate professional, personalized cover letters tailored to any job. Enter job details, your experience, and choose a tone — get a ready-to-use cover letter in seconds. Copy or download as text.

Fibonacci Calculator

Calculate any Fibonacci number instantly. Get the nth term, full sequence, golden ratio approximation, and sequence sum. Supports large numbers with BigInt. Free and 100% client-side.

Gradient Generator

Create stunning CSS gradients with an intuitive visual editor. Supports linear, radial, and conic gradients with customizable color stops, angles, and positions. Pure client-side — instant preview and copy-ready CSS.

CSS Text Gradient Generator

Create beautiful CSS gradient text effects instantly. Customize colors, angles, and preview live. Copy the code with one click. Pure client-side.

Color Palette Generator

Generate beautiful color palettes from a single base color using color theory. Supports complementary, triadic, analogous, monochromatic, split-complementary, and tetradic schemes. Pure client-side — instant results.

Image Color Palette Extractor

Upload any image and instantly extract its dominant colors. Perfect for designers, artists, and developers who need color inspiration from photos, screenshots, or artwork. Pure client-side — your images never leave your browser.

Color Wheel Generator

Create and explore colors with an interactive HSL color wheel. Pick any hue, adjust saturation and lightness, and get instant HEX, RGB, and HSL values. Perfect for designers, artists, and developers. Pure client-side — instant results.

Color Contrast Checker

Test color combinations for WCAG 2.1 AA/AAA accessibility compliance. Calculate contrast ratios instantly. Perfect for designers and developers ensuring text readability. Pure client-side.

Color Shades & Tints Generator

Generate tints, shades, and tones from any base color. Perfect for creating color scales, design systems, and gradients. Pure client-side — instant results.

Color Palette Generator

Generate harmonious color palettes using color theory rules. Choose from monochromatic, analogous, complementary, triadic, and more. Perfect for designers, developers, and brand creators. Pure client-side — instant results.

Web Safe Color Picker

Browse all 216 web-safe colors used in early web design. Click any color to copy its hex code instantly. Perfect for retro-style web projects and cross-browser compatibility.

RGB Color Picker

Pick RGB colors with sliders, preview in real-time, and copy values to clipboard. Simple and fast.

Discord Fonts

Generate fancy text fonts for Discord, Twitter, and Bio. Bold, Italic, Gothic, and more.

Instagram Fonts

Generate fancy text fonts for Instagram, Twitter, and Bio. Bold, Italic, Gothic, and more.

Text Diff Viewer

Compare two text blocks or code snippets to find differences. Privacy-first online diff tool.

List Compare

Compare two lists to find unique items, common items, and combined results. Pure client-side.

Base64 to Image

Convert Base64 strings to images instantly. Secure, client-side decoding with no server uploads.

Image to Base64

Convert images to Base64 strings instantly. Supports PNG, JPG, GIF, WebP. Secure client-side processing with no server uploads.

Base64 Text Encoder / Decoder

Encode plain text to Base64 and decode Base64 back to text instantly. Supports URL-safe Base64 and full UTF-8. Pure client-side.

Text to Binary / Binary to Text

Convert plain text to binary (ASCII) representation and decode binary back to text. Also supports hexadecimal. Pure client-side, instant conversion.

QR Code Generator

Generate QR codes instantly for URLs, text, WiFi, email, and phone numbers. Customize colors and size. Download as PNG. 100% client-side.

QR Code Decoder

Upload or paste a QR code image to instantly decode its content. Supports URLs, WiFi, email, phone numbers, and plain text. 100% client-side — your images never leave your device.

WhatsApp Link Generator

Generate WhatsApp click-to-chat links instantly. Create wa.me links with custom messages for business, support, and personal use. No app required — 100% free and client-side.

Screen Size Comparator

Visually compare screen sizes of phones, tablets, monitors, and TVs. See real physical dimensions side by side with accurate aspect ratio scaling.

JSON Path Finder

Query and extract data from JSON using JSONPath expressions. Pure client-side with syntax highlighting and result preview.

Favicon Generator

Generate website favicons in all standard sizes from any image. Upload, preview, and download PNG icons from 16×16 to 512×512. Pure client-side.

Image Compressor

Compress images online to reduce file size without losing quality. Supports JPEG, PNG, and WebP. Adjust quality, preview results, and download instantly. 100% client-side — no upload to servers.

Image Resizer

Resize images online to any dimensions. Maintain aspect ratio, choose output format (PNG/JPG/WEBP), and download instantly. 100% client-side — no upload to servers.

Image Pixelator

Pixelate images online instantly. Upload a photo, adjust the pixel block size, preview in real time, and download your pixel art. 100% client-side — no upload to servers.

Image Cropper

Crop images online with visual selection. Choose from preset ratios (1:1, 16:9, 4:3) or freeform cropping. Download instantly. 100% client-side — no upload to servers.

Image Watermarker

Add customizable text watermarks to your images online. Adjust position, size, color, opacity, and font. Supports PNG, JPG, and WebP. 100% client-side — your images never leave your device.

Image Filter

Apply stunning photo filters online for free. Adjust grayscale, sepia, blur, brightness, contrast, saturation, and hue rotation. Download your edited image instantly. 100% client-side — no upload to servers.

Aspect Ratio Calculator

Calculate aspect ratios instantly. Enter width and height to get the simplified ratio, decimal value, and common format names. Perfect for images, video, and responsive design. 100% client-side.

Typing Speed Test

Test your typing speed with our free online WPM typing test. Get instant results with words per minute, accuracy percentage, and error analysis. No account required — 100% client-side.

Click Speed Test

Test your clicking speed with our free CPS (Clicks Per Second) tester. Challenge yourself in 5/10/30/60 second modes. Track your score and share with friends.

Mouse Test

Test all mouse buttons, scroll wheel, movement tracking, and click speed in real-time. Works with any mouse including gaming mice with extra buttons.

Webcam Test

Test your webcam online in seconds. Check if your camera is working, view the live video feed, take snapshots, and see device info — all in your browser with zero data upload.

Speaker Test

Test your speakers and audio setup online in seconds. Play test tones, check left/right channels, and verify your sound system is working — all in your browser with zero data upload.

Reaction Time Test

Measure your reaction speed in milliseconds with our free online reaction time test. Challenge yourself, track your scores, and see how you compare. Pure client-side, no data sent to servers.

Age Calculator

Calculate your exact age from birth date to today or any date. Results in years, months, days, weeks, and total days. Pure client-side.

Electricity Cost Calculator

Estimate your monthly and annual electricity costs by adding appliances, setting usage hours, and entering your local energy rate. Free, instant, and completely private — all calculations happen in your browser.

Percentage Calculator

Free online percentage calculator. Calculate percentages, percentage increase, decrease, difference, and reverse percentages instantly. Pure client-side, no ads.

Conversion Rate Calculator

Free online conversion rate calculator. Calculate conversion rates, required visitors, and target conversions for e-commerce, SaaS, and marketing campaigns. Pure client-side, no ads.

ROAS Calculator

Free online ROAS calculator. Calculate Return on Ad Spend, break-even ROAS, and evaluate your advertising campaign performance. Pure client-side, no ads.

Percentage Change Calculator

Free online percentage change calculator. Calculate percent increase, percent decrease, percentage difference, and reverse values. Instant results, pure client-side.

BMI Calculator

Calculate your Body Mass Index (BMI) with multiple classification standards. Get health recommendations and ideal weight range. Pure client-side.

BSA Calculator

Calculate Body Surface Area using 5 standard medical formulas: Du Bois, Mosteller, Haycock, Gehan & George, and Boyd. Used for drug dosing and medical assessments.

Ideal Weight Calculator

Calculate your ideal body weight using scientifically validated formulas: Robinson, Miller, Devine, and Hamwi. Supports both Metric and Imperial units. Pure client-side.

BMR & TDEE Calculator

Calculate your Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE) with multiple formulas. Get personalized calorie recommendations for weight loss, maintenance, or muscle gain. Pure client-side.

TDEE Calculator

Calculate your Total Daily Energy Expenditure (TDEE), Basal Metabolic Rate (BMR), and BMI using the scientifically validated Mifflin-St Jeor equation. Get personalized calorie targets for weight loss, maintenance, and muscle gain. Pure client-side.

Macro Calculator

Calculate your personalized macronutrient targets (protein, carbohydrates, fat) based on your body stats, activity level, and fitness goals. Supports multiple diet plans: Standard, Low Carb, High Protein, Keto, and Custom.

Recipe Scaler

Scale any recipe up or down to match your desired number of servings. Add ingredients, set original and target portions, and get instantly recalculated amounts with smart unit handling. Pure client-side.

Water Intake Calculator

Calculate your personalized daily water intake based on weight, activity level, and climate. Get hourly hydration schedule and tips. Pure client-side.

Body Fat Calculator

Calculate your body fat percentage using the U.S. Navy method or BMI-based formula. Supports both metric and imperial units.

Heart Rate Zones Calculator

Calculate your personal heart rate training zones for optimal running, cycling, and fitness training. Supports multiple formulas including Fox, Tanaka, Gellish, and Karvonen.

Running Pace Calculator

Calculate your running pace per km or mile, estimated finish time, and split times for any distance including 5K, 10K, half marathon, and marathon. Pure client-side.

Swim Pace Calculator

Calculate your swimming pace per 100m or 100 yards, speed in km/h and mph, and lap splits for any pool distance and time.

Walking Pace Calculator

Calculate your walking pace per km or mile, estimated finish time, and split times for any distance. Supports leisure, brisk, and power walking paces. Pure client-side.

Sleep Calculator

Calculate the best time to wake up or go to bed based on 90-minute sleep cycles. Wake up feeling refreshed, not groggy. Pure client-side.

Calories Burned Calculator

Calculate how many calories you burn during exercise based on MET values. Supports 50+ activities including running, swimming, cycling, and more. Pure client-side.

Calorie Deficit Calculator

Calculate your optimal daily calorie deficit for safe and effective weight loss. Get personalized calorie targets, projected weight loss timelines, and weekly forecasts based on your TDEE and goals. Pure client-side.

Weight Converter

Convert between all weight and mass units instantly: kilograms, pounds, ounces, grams, milligrams, metric tons, stones, grains, carats, and more. Real-time conversion with formulas and reference table.

Length Converter

Convert between all length units instantly: meters, feet, inches, centimeters, millimeters, kilometers, miles, yards, and more. Real-time conversion with formulas and reference table.

Unit Converter

Convert units instantly across 5 categories — length, weight, temperature, speed, and volume. Metric ↔ Imperial made simple. Pure client-side.

Pressure Converter

Convert between all pressure units instantly: pascals, kilopascals, megapascals, bars, millibars, atmospheres, psi, torr, mmHg, inHg, inches of water, and feet of water. Real-time conversion with formulas and reference table.

Energy Converter

Convert energy units instantly — Joules, Kilojoules, Calories, Kilocalories, Watt-hours, Kilowatt-hours, BTU, Electron Volts, and more. Metric & Imperial. 100% client-side.

Tip Calculator

Calculate restaurant tips, split bills among friends, and see total cost instantly. Pure client-side with no data sent to servers.

Mortgage Calculator

Calculate your total monthly mortgage payment including principal, interest, property taxes, homeowners insurance, PMI, and HOA fees. Complete PITI breakdown with amortization schedule.

Rent vs Buy Calculator

Compare the total cost of renting vs buying a home over time. Calculate your break-even point and make an informed decision on whether to rent or buy.

Loan Calculator

Calculate monthly loan payments, total interest, and full amortization schedule. Free mortgage calculator with equal installment & equal principal options. Supports multiple currencies. Pure client-side.

Debt-to-Income Ratio Calculator

Calculate your debt-to-income (DTI) ratio instantly. Enter monthly income and debts to see your DTI percentage and loan qualification status. Free, private, no registration.

Credit Card Payoff Calculator

Calculate how long it will take to pay off your credit card debt. See total interest, compare payment strategies, and find the best repayment plan. All calculations happen in your browser — your financial data never leaves your device.

Car Loan Calculator

Calculate your monthly car payment, total interest, and total cost. Includes down payment, trade-in, sales tax, and fees. Compare loan terms instantly. 100% free and private.

Lease Calculator

Calculate car lease payments, equipment lease costs, and property lease expenses. Compare lease vs buy with total cost breakdown.

EMI Calculator

Free online EMI calculator. Calculate Equated Monthly Installment for home loan, car loan, personal loan, education loan. View amortization schedule, total interest breakdown, and downloadable CSV. Pure client-side — your data never leaves your device.

IRR Calculator

Calculate the Internal Rate of Return (IRR) for any investment project with custom cash flows. See NPV, payback period, profitability index, benchmark comparisons, and cash flow visualization. Pure client-side, instant results.

CAGR Calculator

Calculate the Compound Annual Growth Rate (CAGR) for any investment or business metric. See total return, growth multiple, future projections, and benchmark comparisons. Pure client-side, instant results.

WACC Calculator

Calculate the Weighted Average Cost of Capital (WACC) for any company using equity, debt, cost of equity, and cost of debt. Includes CAPM method, capital structure visualization, and industry benchmarks. Pure client-side, instant results.

Compound Interest Calculator

Calculate compound interest growth with any principal, rate, and compounding frequency. See year-by-year breakdown, total interest earned, and investment multiples. Pure client-side, instant results.

APY Calculator

Calculate Annual Percentage Yield (APY) from nominal APR and compounding frequency. Compare yields across different compounding periods and convert APY back to APR. Pure client-side, instant results.

Stock Average Calculator

Free online stock average calculator. Enter multiple buy prices and share quantities to instantly calculate your average cost per share, total investment, and breakeven price. Perfect for dollar-cost averaging and average-down strategies. 100% client-side.

Quadratic Equation Solver

Solve quadratic equations ax² + bx + c = 0 instantly. Get real and complex roots, discriminant, vertex, and step-by-step solution. Free and 100% client-side.

Simple Interest Calculator

Calculate simple interest and total amount with any principal, rate, and time period. Supports yearly, monthly, and daily time units. Pure client-side, instant results.

Budget Calculator

Plan your monthly budget with our free online calculator. Track expenses by category, visualize spending with charts, and calculate your savings rate instantly.

Salary Calculator

Convert between annual salary, monthly salary, weekly wage, daily wage, and hourly rate. Estimate take-home pay after taxes for US, China, UK, and EU. Pure client-side.

Salary Calculator

Convert between annual salary, monthly salary, weekly wage, daily wage, and hourly rate. Estimate take-home pay after taxes for US, China, UK, and EU. Pure client-side.

Paycheck Calculator

Calculate your take-home pay after taxes and deductions. Enter your gross salary, filing status, and deductions to see your net income per paycheck.

Net Worth Calculator

Calculate your net worth by adding up all your assets and subtracting your liabilities. Track your financial health and plan for the future.

Inflation Calculator

Calculate how inflation affects your purchasing power over time. See future equivalent amounts, real value loss, and year-by-year breakdown. Pure client-side, instant results.

Discount Calculator

Calculate sale price and savings instantly. Enter original price and discount percentage to see final price and amount saved. Pure client-side, zero latency.

Sales Tax Calculator

Calculate sales tax and total price instantly. Enter the original price and tax rate to see the tax amount and final cost. Free, fast, and 100% client-side.

Income Tax Calculator

Calculate income tax and net take-home pay instantly. Enter your annual income and tax rate to see your tax amount, after-tax income, and effective tax rate. Free, fast, and 100% client-side.

VAT Calculator

Calculate VAT amount, add VAT to a price, or remove VAT from a total. Supports all standard VAT rates. Pure client-side, instant results.

Profit Margin Calculator

Calculate profit margin, markup percentage, and selling price instantly. Enter cost and price to see profit metrics. Free, private, no registration.

ROI Calculator

Calculate your return on investment (ROI) instantly. Enter initial investment and final value to see ROI percentage, total gain or loss, and annualized return. Pure client-side, zero latency.

Car Payment Calculator

Estimate your car loan monthly payment, total interest, and full ownership cost instantly. Enter vehicle price, down payment, trade-in value, interest rate, and loan term. Free, private, no registration.

Amortization Schedule Calculator

Generate a complete loan amortization schedule instantly. Calculate monthly payments, total interest, and see a year-by-year breakdown of principal and interest. Pure client-side, zero latency.

EMI Calculator

Free online EMI calculator. Calculate Equated Monthly Installment for home loan, car loan, personal loan, education loan. View amortization schedule, total interest breakdown, and downloadable CSV. Pure client-side — your data never leaves your device.

Color Converter

Convert colors between RGB, Hex, HSL, and CMYK formats instantly. Auto-detect any color format you paste, see live preview, and save conversion history. Pure client-side — no data sent anywhere.

JWT Decoder

Decode and inspect JWT tokens instantly in your browser. Parse header, payload, and signature with zero server round-trips.

JWT Encoder

Generate and sign JWT tokens in your browser using HMAC-SHA256/384/512. Enter your payload and secret to instantly create signed tokens — zero server interaction.

World Time & Timezone Converter

Convert time across 350+ time zones instantly. Check world clock for major cities. Plan meetings across time zones. Pure client-side.

Currency Converter

Free online currency converter with real-time exchange rates for 30+ currencies. Convert USD, EUR, GBP, CNY, JPY and more instantly. Pure client-side with offline fallback.

Credit Card Validator

Validate credit card numbers instantly using the Luhn algorithm. Detects card type (Visa, Mastercard, Amex, etc.) and checks formatting. 100% client-side, no data leaves your browser.

Morse Code Translator

Translate text to Morse code and decode Morse code back to text instantly. Supports letters, numbers, punctuation, and audio playback. 100% client-side.

What Is My IP Address

Find your public IPv4/IPv6 address instantly. View location, ISP, timezone, and network details. 100% client-side, your data never leaves your browser.

DNS Lookup

Query DNS records for any domain using Cloudflare DNS-over-HTTPS. Check A, AAAA, MX, NS, TXT, CNAME, SOA, and CAA records instantly. 100% client-side — no data sent to our servers.

Subnet Calculator

Calculate IP subnet details instantly. Enter an IP address and CIDR prefix to get network address, broadcast, usable host range, subnet mask, and more. Pure client-side.

What Is My User Agent

Check your browser user agent, operating system, screen resolution, and device details instantly. Free online tool with no signup.

Browser & System Information

Comprehensive browser and system information detector. View your browser name, version, OS, screen resolution, device capabilities, supported Web APIs, network info, and hardware details. Pure client-side, no data sent to servers.

Color Name Finder

Enter any hex, RGB, or HSL color value and instantly find the closest named color match. See color names, hex values, RGB, HSL, and similar colors.

HTML Entity Encoder / Decoder

Convert text to HTML entities and decode HTML entities back to text instantly. Supports named entities (<) and numeric entities (<). Pure client-side.

Meta Description Generator

Generate SEO-optimized meta descriptions for any web page. Improve click-through rates from Google search results with compelling, keyword-rich descriptions. Pure client-side, instant generation.

Meta Tag Generator

Generate SEO-friendly meta tags, Open Graph tags, and Twitter Card tags for any website. Live preview with character counters. Pure client-side, instant generation.

Meta Description Generator

Generate SEO-optimized meta descriptions for any web page. Improve click-through rates from Google search results with compelling, keyword-rich descriptions. Pure client-side, instant generation.

SERP Preview

Visualize how your page will appear in Google search results. Check title and description length with live desktop and mobile previews. Pure client-side, instant preview.

Text Sorter

Sort lines of text alphabetically, by length, in reverse, or randomly shuffle. Remove duplicates and empty lines. Pure client-side, instant.

HTML Table Generator

Generate clean HTML table code from CSV or TSV data. Customizable borders, headers, zebra striping, and alignment. Pure client-side, copy-ready HTML output.

Online Notepad

A clean, distraction-free online notepad with auto-save to your browser. Write notes, count words and characters, download as .txt. No account required — 100% private.

GPA Calculator

Free online GPA calculator supporting 4.0 scale with weighted/unweighted options. Add unlimited courses, calculate your grade point average instantly. Pure client-side, no data sent anywhere.

Grade Calculator

Free online grade calculator. Calculate your weighted course grade from assignments, or find out what score you need on your final exam to reach your target grade.

Final Grade Calculator

Calculate exactly what score you need on your final exam to reach your target grade. Enter your current grade, final exam weight, and desired score — get instant results. Free, private, no signup.

Grammar & Spell Checker

Check grammar, spelling, and style in your text instantly. Identifies errors, suggests corrections, and explains rules — all in your browser with zero data sent to servers.

BPM Calculator

Tap along to any song to find its BPM instantly. Free online tap tempo tool for musicians, DJs, and dancers.

Text Reverser

Reverse text online instantly. Flip characters, reverse word order, or mirror entire sentences. Free, fast, and 100% client-side.

Superscript & Subscript Generator

Convert any text to superscript (¹²³) or subscript (₁₂₃) instantly. Perfect for math, chemistry, social media, and academic writing. Free, fast, and 100% client-side.

Find and Replace Text

Search and replace text online instantly. Supports case-sensitive matching, regex mode, replace all or first occurrence. Free, fast, and 100% client-side.

Sitemap Generator

Generate standard XML sitemaps instantly. Paste your URLs, set priority and change frequency, then download or copy your sitemap.xml. 100% client-side, free, no registration.

Robots.txt Generator

Generate properly formatted robots.txt files to control how search engines crawl your website. Select bots, set allow/disallow rules, add sitemap, and download instantly. Pure client-side, privacy-safe.

Random Color Generator

Generate beautiful random colors with one click. Create color harmonies, palettes, and copy HEX, RGB, or HSL values instantly. Pure client-side, no limits.

Fake Data Generator

Generate realistic fake data for testing and development. Create mock names, emails, addresses, phone numbers, companies, and more. Export as JSON, CSV, or SQL. 100% client-side.

Invoice Generator

Create professional invoices instantly. Customize company & client info, add line items, calculate tax, and print or save as PDF. No signup required.

Text to Slug

Convert any text into clean, URL-friendly slugs in real time. Multiple formats, custom separators. Pure client-side.

Roman Numeral Converter

Convert numbers to Roman numerals and vice versa. Supports 1–3999 with validation and history.

Character Counter

Count characters, words, sentences, paragraphs, lines, bytes and more. Real-time stats with social media limits.

Online Countdown Timer

Create a free online countdown timer for any event. Track days, hours, minutes, and seconds in real-time with beautiful visuals.

Screen Resolution Detector

Instantly check your screen resolution, viewport size, pixel density, browser details, and device information. 100% free, private, and client-side.

Image Format Converter

Convert images between PNG, JPG, and WebP formats online for free. Adjust quality for lossy formats, preview results, and download instantly. 100% client-side — your images never leave your device.

Data Size Converter

Convert data sizes instantly between bytes, kilobytes, megabytes, gigabytes, terabytes, and petabytes. Supports binary (1024) and decimal (1000) standards. Pure client-side.

File Size Converter

Convert file sizes instantly between bytes, kilobytes, megabytes, gigabytes, terabytes, and petabytes. Decimal (1000) and binary (1024) prefixes supported. Pure client-side.

Readability Analyzer

Analyze text readability with Flesch-Kincaid, Gunning Fog, Coleman-Liau, SMOG and ARI scores. Instant, client-side.

Reading Time Calculator

Estimate reading time for articles, essays, books, and any text. Supports slow, average, and fast reading speeds. Instant results, 100% private.

Coin Flipper

Flip a virtual coin online. Heads or Tails? Make fair random decisions with our free coin toss tool. Track statistics and enjoy smooth animations.

Dice Roller

Roll virtual dice online for free. Supports D4, D6, D8, D10, D12, D20, and D100. Roll multiple dice at once, see the total sum, and track your roll history. Perfect for board games, D&D, and RPGs.

Wheel Spinner

Spin a colorful wheel to make random decisions. Add your own options, customize colors, and let the wheel pick for you. Great for games, giveaways, classroom activities, and decision-making.

Random Team Generator

Shuffle and divide any list of names into random teams or groups instantly. Perfect for classrooms, sports, office activities, and party games. 100% client-side, no data sent to servers.

Random Country Generator

Generate random countries instantly. Explore flags, capitals, populations, currencies, and more. Perfect for travel inspiration, education, and games.

Random Name Generator

Generate random names instantly. Choose from male, female, or unisex names across 12+ cultures. Perfect for characters, babies, test data, and creative writing.

SQL Formatter

Format and beautify SQL queries instantly. Supports Standard SQL, MySQL, PostgreSQL, and SQLite. Configurable indentation, keyword casing, and line width. Pure client-side.

Text to Speech

Convert text to natural-sounding speech instantly in your browser. Choose from multiple voices, adjust speed, pitch, and volume. Pure client-side — your text never leaves your device.

Speech to Text

Convert your voice to text in real-time using your browser's built-in speech recognition. Supports 20+ languages. No upload needed — all processing happens locally on your device.

Statistics Calculator

Free online statistics calculator. Calculate mean, median, mode, standard deviation, variance, quartiles, range, and detect outliers. Step-by-step breakdown. No ads, instant results, pure client-side.

Pie Chart Generator

Free online pie chart generator. Create stunning pie charts, doughnut charts, and polar area charts with custom colors, labels, and data. Export as PNG. No signup needed, pure client-side.

Bar Chart Generator

Free online bar chart generator. Create beautiful vertical bar charts, horizontal bar charts, stacked bar charts, and grouped bar charts with custom colors, labels, and axes. Export as PNG. No signup needed, pure client-side.

Line Chart Generator

Free online line chart generator. Create beautiful line charts, area charts, spline charts, and stepped charts with multi-series support, custom colors, and axis labels. Export as PNG. No signup needed, pure client-side.

Flip Text Generator

Transform your text upside down, reverse it, or create mirror text. Perfect for social media bios, fun messages, and creative designs. Pure client-side.

Meme Generator

Create hilarious memes in seconds. Upload any image, add top and bottom text, customize font size and color, then download and share. Pure client-side — your images never leave your device.

Cipher / Encryption Decoder

Decode and encode text using classic ciphers: Caesar cipher (1-25 shift), ROT13, Atbash, reverse text, and Base64. Pure client-side, no data leaves your browser.

Email Signature Generator

Create professional HTML email signatures instantly. Choose from 4 templates, customize colors, add social links, and copy or export your signature. Pure client-side, no data leaves your browser.

One Rep Max Calculator

Calculate your one rep max with Epley, Brzycki, Lombardi, Mayhew and O'Conner formulas. Includes plate loading calculator and percentage tables.

YAML Formatter

Format, validate, minify, and convert YAML to JSON instantly. Pure client-side with structure analysis.

AI Language Detector

Detect the language of any text instantly with AI-powered statistical analysis. Supports 100+ languages with confidence scores. No signup required, 100% private, works offline in your browser.

AI Content Detector

Analyze text to estimate AI-generation probability using statistical linguistic features. Pure client-side — your text never leaves your device.

AI Token Counter

Estimate token count for ChatGPT, Claude, Gemini, and other LLMs. Plan your prompts and stay within context limits. 100% client-side.

AI Text Paraphraser

Rewrite and rephrase text in multiple styles: Formal, Concise, Creative, Academic, or Casual. No API key needed — 100% client-side processing.

AI Grammar Checker

Check grammar, spelling, and writing style instantly with AI-powered suggestions. Identifies errors, explains rules, and shows corrections — all in your browser with zero data sent to servers.

AI Email Writer

Generate professional, friendly, formal, or persuasive emails instantly. Enter a topic, recipient, and tone — get a polished email in seconds. 100% free, no signup, client-side only.

AI Article Outline Generator

Generate structured article outlines instantly. Enter a topic, choose your article type and tone — get a complete outline with headings, sections, and key points. 100% free, no signup, client-side only.

AI Video Script Generator

Generate engaging video scripts for YouTube, TikTok, Instagram, and LinkedIn in seconds. Choose your platform, duration, and tone, and get a complete script with hook, body, and call-to-action. 100% free, no signup, client-side only.

AI Content Repurposer

Transform a single piece of content into multiple formats instantly. Repurpose blog posts into Twitter threads, LinkedIn posts, Instagram captions, video scripts, newsletters, and more. 100% free, no signup, client-side only.

AI SEO Meta Optimizer

Generate SEO-optimized meta titles, descriptions, and JSON-LD structured data instantly. Free SERP preview, keyword density analysis, and schema markup generator. No signup required.

Retirement Calculator

Plan your retirement with our free calculator. Estimate how much you need to save, project your nest egg growth, and see if your savings will last through retirement. Pure client-side — your financial data never leaves your device.

Unix Timestamp Converter

Convert Unix timestamps to human-readable dates and vice versa. Supports seconds and milliseconds. Real-time current timestamp display.

CSS Clip Path Generator

Generate CSS clip-path shapes visually. Choose from presets or customize your own — circle, ellipse, polygon, inset. Copy ready-to-use CSS instantly. 100% free and client-side.

CSS Specificity Calculator

Calculate CSS selector specificity instantly. Understand selector weight, priority scores, and resolve style conflicts. Enter any CSS selector to see its specificity value in (a,b,c) format. Free and client-side.

Box Shadow Generator

Create beautiful CSS box shadows with a live visual editor. Adjust offset, blur, spread, and color — copy ready-to-use CSS instantly. 100% free and client-side.

CSS Flexbox Generator

Visually design and generate CSS Flexbox layouts. Preview, tweak properties, and copy the code instantly.

CSS Animation Generator

Create CSS keyframe animations visually. Choose from 16 presets, customize timing, and copy the code instantly.

CSS Grid Generator

Visually design and generate CSS Grid layouts. Customize rows, columns, gaps, and alignment. Preview and copy the code instantly.

CSS Grid Generator

Design CSS Grid layouts visually. Set rows, columns, gaps, and areas — copy ready-to-use CSS instantly. Perfect for responsive web design. 100% free and client-side.

Cron Expression Generator

Generate, parse and validate cron expressions. Get human-readable descriptions and next execution times. Pure client-side.

Text Summarizer

Extract key sentences from any article, essay, or document instantly. Pure client-side, no data sent to servers.

AI Punctuation Adder

Automatically add punctuation to unpunctuated text. Perfect for speech-to-text transcripts, dictated notes, and raw text cleanup.

Placeholder Image Generator

Generate custom placeholder images in any size and color for your web design mockups and prototypes. Pure client-side, instant download.

Keyboard Tester

Free online keyboard tester to check if every key on your keyboard works. Visual QWERTY layout with real-time key detection and detailed event info. Pure client-side.

Palindrome Checker

Check if your text is a palindrome. Supports case-insensitive mode, ignore spaces/punctuation, and batch line checking.

Number to Words Converter

Convert any number into written English words instantly. Perfect for writing checks, invoices, legal documents, and formal reports. Supports up to 999 trillion. Pure client-side.

Due Date Calculator

Calculate your pregnancy due date using last menstrual period (LMP), conception date, or ultrasound. Track trimesters, milestones, and fetal development. 100% private — all in your browser.

Conception Date Calculator

Calculate your estimated conception date based on last menstrual period (LMP), due date, or ultrasound. Discover your conception window and pregnancy timeline. 100% private — all in your browser.

Ovulation Calculator

Track your menstrual cycle, predict ovulation day, fertile window, and next period date. 100% private — all calculations happen in your browser.

Chmod Calculator

Calculate Linux file permissions instantly. Toggle read, write, and execute bits for owner, group, and others to get the numeric chmod value and command.

GCD & LCM Calculator

Calculate the Greatest Common Divisor (GCD/GCF) and Least Common Multiple (LCM) of two or more numbers. Shows the Euclidean algorithm step-by-step. Free and instant.

Standard Deviation Calculator

Calculate sample standard deviation, population standard deviation, variance, mean, and more. Enter any list of numbers instantly. Free and pure client-side.

Z-Score Calculator

Calculate the z-score (standard score) for any data point. Find percentiles, tail probabilities, and interpret how far a value is from the mean. Free and pure client-side.

Permutation & Combination Calculator

Calculate permutations (nPr) and combinations (nCr) instantly. Enter n and r values to get results with step-by-step explanations. Free, fast, and client-side.

Tic Tac Toe

Play the classic Tic Tac Toe game online for free. Challenge the computer AI or play with a friend on the same device. No downloads, no signups — just instant fun.

World Clock

Track time across multiple cities and time zones in real time. Free online world clock with 20+ major cities. Pure client-side, instant updates.

Mean Median Mode Calculator

Free online calculator to find mean, median, mode, range, and other descriptive statistics from any data set. Paste numbers and get instant results with step-by-step explanation.

PDF Merger

Merge multiple PDF files into one document instantly. Drag and drop PDFs, reorder them, and download the combined file. 100% free, no upload, no watermark.

PDF Compressor

Compress PDF files to reduce their size while maintaining readable quality. Choose compression level, preview savings, and download instantly. 100% client-side — no upload to servers.

PDF Splitter

Split PDF files into individual pages or extract specific pages. Upload a PDF, choose your split method, and download the pages you need. 100% client-side — no upload to servers.

Anagram Solver

Solve anagrams and unscramble letters instantly. Enter any set of jumbled letters and find all possible words. Free online anagram solver with a built-in dictionary of 5,000+ words. No signup needed.

Factorial Calculator

Calculate the factorial of any non-negative integer n! Supports large numbers with BigInt, shows step-by-step multiplication, digit count, and scientific notation. Free and instant.

Prime Number Calculator

Check if a number is prime, generate lists of prime numbers in any range, find the Nth prime, and perform prime factorization. Free, instant, and 100% client-side.

Savings Goal Calculator

Calculate exactly how much you need to save each month to reach your financial goal. Factor in your current savings, interest rate, and timeline to create a realistic savings plan. Pure client-side, instant results.

Debt Payoff Calculator

Calculate how long it will take to pay off your debts using the snowball or avalanche method. See your payoff timeline, total interest, and savings compared to minimum payments.

Meme Generator

Create hilarious memes in seconds. Upload any image, add top and bottom text, customize font size and color, then download and share. Pure client-side — your images never leave your device.

Image to PDF Converter

Convert images to PDF instantly. Upload JPG, PNG, WebP or GIF files, choose page settings, and download your PDF. 100% free, no upload, no watermark.

JSON to YAML Converter

Convert JSON data to YAML format instantly in your browser. Free, private, no server upload. Supports file upload, validation, and download.

YAML to JSON Converter

Convert YAML data to JSON format instantly in your browser. Free, private, no server upload. Supports file upload, validation, and download.

Border Radius Generator

Create perfect CSS rounded corners with a live visual editor. Adjust each corner independently, choose units (px, %, em, rem), and copy ready-to-use CSS instantly. 100% free and client-side.

Text Shadow Generator

Create beautiful CSS text-shadow effects with a live visual editor. Generate soft shadows, glowing text, neon effects, 3D depth and more — copy ready-to-use CSS instantly. 100% free and client-side.

CSS Filter Generator

Generate CSS filter effects visually with real-time preview. Apply blur, brightness, contrast, grayscale, hue-rotate, saturate & more. Upload your image or use sample. Copy ready-to-use CSS instantly. 100% free and client-side.

Online Metronome

Free online metronome with adjustable BPM, time signatures, and accent beats. Perfect for musicians, dancers, and practice sessions. Pure client-side, no download needed.

Tone Generator

Generate precise audio tones from 20Hz to 20kHz. Test speakers, tune instruments, calibrate audio equipment. Pure client-side, no data sent to servers.

Virtual Piano

Free online virtual piano with realistic synthesized sound using Web Audio API. Play with keyboard or mouse, record your melodies, learn chords, and explore preset songs. Pure client-side, no download needed.

Chinese Zodiac Calculator

Discover your Chinese zodiac animal, element, and personality traits based on your birth year. Learn about compatibility, lucky numbers, and more.

YouTube Tags Generator

Generate optimized YouTube video tags instantly. Boost your video SEO with targeted keywords. Pure client-side, no data sent to servers.

Exponent Calculator

Free online exponent and power calculator. Compute a^b, logarithms, square roots, cube roots, and scientific notation. Instant results, pure client-side.

Business Name Generator

Generate creative, catchy, and brandable business names instantly. Enter keywords, pick your industry and style, and get 10+ unique name ideas. Perfect for startups, shops, and new ventures.

Slogan Generator

Generate creative, catchy, and memorable slogans and taglines for your business, product, or brand instantly. Enter your brand name, pick your industry and tone, and get 10+ unique slogan ideas. Perfect for marketing, branding, and advertising.

Blog Title Generator

Generate creative, catchy, and SEO-optimized blog post titles and headlines instantly. Enter your topic, choose a title type and tone, and get 10+ unique blog title ideas that drive clicks and engagement.

AI Text Humanizer

Transform robotic AI-generated text into natural, human-like writing. Choose your tone, apply smart linguistic patterns, and make any text sound authentically human. Free, instant, and private.

AI Hashtag Generator

Generate optimized hashtags for Instagram, TikTok, Twitter, LinkedIn, and YouTube. Enter a keyword or topic and get relevant, categorized hashtag suggestions instantly. 100% free, no signup, client-side only.

AI Content Rewriter

Rewrite, paraphrase, and optimize your content instantly. Choose from 6 rewriting modes to adapt your text for any platform or audience. 100% free, no signup, client-side only.

Social Media Post Scheduler

Plan and preview social media posts for Twitter/X, Instagram, Facebook, and LinkedIn. Check character limits, preview appearance, and get optimal posting times.

Text to Emoji Converter

Convert any text into emoji-filled messages instantly. Keywords are replaced or decorated with matching emojis. Free online tool.

CSS Flexbox Playground

Learn CSS Flexbox with an interactive playground. Adjust properties visually, see instant results, and copy the generated CSS code. Free online tool for developers.

CSS Triangle Generator

Generate pure CSS triangles, arrows, and directional indicators with a live visual editor. Choose from 12 preset directions, customize size and color, and copy production-ready CSS instantly. No images needed — 100% client-side.

Loading Spinner Generator

Generate pure CSS loading spinners and animated loaders with a live visual editor. Choose from 10+ spinner types, customize size, color, and animation speed, and copy production-ready CSS instantly. No images needed — 100% client-side.

CSS Button Generator

Design beautiful CSS buttons with live preview. Customize colors, gradients, shadows, borders, hover effects and more. Copy the generated CSS instantly. 100% client-side.

Screen Color Test

Test your monitor for dead pixels, stuck pixels and color accuracy with full-screen solid colors. No installation needed.

CSS Tooltip Generator

Design beautiful CSS tooltips with live preview. Customize position, colors, arrows, animations, and copy the generated CSS instantly. 100% client-side.

Ratio Calculator

Simplify ratios, solve proportions, and compare values. Enter two or more numbers to find their simplest ratio form instantly.

Proportion Calculator

Solve proportion equations (a/b = c/d), scale recipes, and split quantities by ratio. Enter three known values to find the fourth, or divide a total by a given ratio.

Lottery Number Generator

Generate lucky lottery numbers for Powerball, Mega Millions, EuroMillions, 6/49, and custom formats. 100% free online tool.

Signature Generator

Create elegant handwritten digital signatures instantly. Choose from 8+ cursive fonts, customize colors, size, and style. Download your signature as PNG. Pure client-side — no data leaves your browser.

Fuel Cost Calculator

Calculate fuel costs for road trips. Enter distance, fuel efficiency, and price to estimate total gas expenses. Split costs among passengers. Pure client-side.

Gas Mileage Calculator

Calculate your vehicle's fuel economy instantly. Convert between MPG (US/UK), L/100km, and km/L. Get fuel efficiency ratings and cost estimates. Pure client-side, free, no data collection.

Screen DPI Calculator

Calculate your screen DPI (dots per inch) or PPI (pixels per inch) instantly. Enter resolution and diagonal size to see pixel density, sharpness rating, and compare with common devices. 100% free and client-side.

Area Calculator

Calculate the area of 8 common geometric shapes — rectangle, square, circle, triangle, trapezoid, parallelogram, rhombus, and ellipse. Instant results with formulas shown. Pure client-side.

Volume Calculator

Calculate the volume and surface area of 6 common 3D shapes — sphere, cube, cylinder, cone, rectangular prism, and pyramid. Instant results with formulas shown. Supports multiple units. Pure client-side.

Angle Converter

Convert between all angle units instantly: degrees, radians, gradians, arcminutes, arcseconds, revolutions, and milliradians. Real-time conversion with formulas and reference table.

Collatz Conjecture Calculator

Explore the famous 3n+1 Collatz conjecture. Enter any positive integer and see the complete sequence, total steps, peak value, and a visual chart. Free, instant, and runs entirely in your browser.

Heat Index Calculator

Calculate the heat index (feels-like temperature) based on temperature and humidity. Get heat safety warnings and health recommendations. Pure client-side.

Area Converter

Convert between all area units instantly: square meters, square kilometers, square feet, square inches, square yards, square miles, acres, and hectares. Real-time conversion with formulas and reference table.

Force Converter

Convert between all force units instantly: newtons, kilonewtons, dynes, kilogram-force, pound-force, ounce-force, poundals, meganewtons, and millinewtons. Real-time conversion with formulas and reference table.

Power Converter

Convert instantly between all power units: watts, kilowatts, megawatts, milliwatts, horsepower, metric horsepower, BTU per hour, calories per second, joules per second and kilojoules per second. Real-time conversion with formulas and reference table.

Gas Mileage Calculator

Calculate your vehicle's fuel economy instantly. Convert between MPG (US/UK), L/100km, and km/L. Get fuel efficiency ratings and cost estimates. Pure client-side, free, no data collection.

Speed Converter

Convert between all speed and velocity units instantly: miles per hour, kilometers per hour, meters per second, knots, feet per second, mach, and more. Real-time conversion with formulas and reference table.

Torque Converter

Convert torque units instantly: Newton-meter, kilogram-force meter, pound-force foot, pound-force inch, dyne centimeter, and more. Free online tool with real-time conversion.

Volume Converter

Convert between all volume and capacity units instantly: milliliters, liters, gallons, quarts, pints, cups, fluid ounces, tablespoons, teaspoons, cubic meters, and more. Real-time conversion with formulas and reference table.

NPV Calculator

Calculate the Net Present Value (NPV) of any investment or project with custom cash flows and discount rate. See investment decision guidance, profitability index, payback period, benchmark comparison, and visual charts. Pure client-side, instant results.

Habit Tracker

Track your daily habits with a visual calendar, streak counter & completion stats. Pure frontend, no signup required — all data stays in your browser.

Tabata Timer

Free online Tabata timer for high-intensity interval training. Customize work/rest intervals, track rounds, with audio cues and visual countdown. No signup needed.

Breathing Exercise Timer

Free guided breathing exercise timer with visual breath cues. Practice 4-7-8, box breathing, coherent breathing, and more. Reduce stress and improve focus instantly. No signup needed.

Ideal Weight Calculator

Calculate your ideal body weight using scientifically validated formulas: Robinson, Miller, Devine, and Hamwi. Supports both Metric and Imperial units. Pure client-side.

Temperature Converter

Convert temperatures instantly between Celsius, Fahrenheit and Kelvin. Real-time bidirectional conversion with formulas and reference table. Pure client-side.

Meeting Time Planner

Find the perfect meeting time for participants in different time zones. Visual working hours overlap, instant local time conversion, and one-click sharing. Pure client-side.

Meeting Cost Calculator

Calculate how much your meetings cost in real time. Enter attendee salaries and duration to see the total cost per meeting. Pure client-side.

CSS Unit Converter

Convert any CSS value between px, rem, em, vw, vh, %, pt, pc, ch, ex, cm, mm, and in. Set your base font size and viewport dimensions for accurate real-time conversion. Pure client-side.

Ohm's Law Calculator

Calculate voltage, current, resistance, and power using Ohm's Law. Enter any two values to find the other two instantly. Pure client-side.

Resistor Color Code Calculator

Decode resistor color bands to resistance value, tolerance, and temperature coefficient. Supports 4-band, 5-band, and 6-band resistors. Reverse lookup available.

LED Resistor Calculator

Calculate the exact series resistor value and power rating for your LED circuit. Enter supply voltage, LED forward voltage, current, and LED count to get the resistor value, power dissipation, and nearest standard E12 resistor instantly.

Work Hours Calculator

Free online work hours calculator. Enter your start and end times, add breaks, and instantly get your total hours, regular time, and overtime. Perfect for employees and freelancers. 100% client-side.

Significant Figures Calculator

Free online significant figures calculator. Instantly count significant figures in any number and round to your desired precision. Perfect for chemistry, physics, and engineering students.

Responsive Design Tester

Test how your website looks on different screen sizes and devices. Preview your site on mobile, tablet, and desktop resolutions with a single click. Perfect for web developers and designers to ensure responsive design compatibility.

SVG Shape Generator

Free online SVG shape generator. Create rectangles, circles, ellipses, lines, polygons, and paths with a visual editor. Edit fill, stroke, opacity, and geometry in real time. Copy SVG code or download the file instantly.

Dog Age Calculator

Convert your dog's age to human-equivalent years based on breed size. More accurate than the old "times 7" rule. Pure client-side.

Cat Age Calculator

Convert your cat's age to human-equivalent years. More accurate than the old "times 7" rule. Pure client-side, instant results.

Love Calculator

Free online love calculator. Calculate love compatibility and relationship match percentage between two names using the classic FLAMES algorithm. Fun, shareable, and entertaining!

Random Quote Generator

Discover inspirational, motivational, and wisdom quotes from famous authors. Copy, share, and get inspired daily!

Internet Speed Test

Test your internet connection speed in seconds. Measure download speed, upload speed, and ping latency with our free online speed test tool. No ads, instant results, pure client-side.

Glassmorphism Generator

Free online CSS glassmorphism generator. Create beautiful frosted glass UI effects with real-time preview. Adjust transparency, blur, saturation, color, border radius, and shadow. Copy-ready CSS code.

Neumorphism Generator

Free online CSS neumorphism generator. Create beautiful soft UI (neumorphic) effects with real-time preview. Adjust intensity, blur, color, and shape. Copy-ready CSS code.

CSS Pattern Generator

Free online CSS pattern generator. Create seamless background patterns (stripes, dots, checkerboard, grid, diagonal lines) with customizable colors and size. Copy-ready CSS code.

Bingo Card Generator

Generate free printable bingo cards instantly. Create custom word bingo or classic number bingo (1-75) for classrooms, parties, and events. Print or download as image.

Flashcard Maker

Create, study, and memorize with free online flashcards. Build custom decks, flip cards, and track your progress. 100% private — no signup needed.

Life Path Number Calculator

Calculate your Life Path Number from your birth date. Discover your destiny, personality traits, strengths, challenges, and life purpose based on numerology. Free, private, and instant.

Image to ASCII Art

Free online image to ASCII art converter. Upload any image and instantly convert it into text-based ASCII art with adjustable resolution, character sets, and contrast. Pure client-side processing — no server uploads.

Break-Even Calculator

Calculate your break-even point in units and revenue instantly. Enter fixed costs, variable costs, and selling price to find when your business starts making profit. Supports target profit analysis. Pure client-side.

Download Time Calculator

Estimate how long it takes to download any file based on your internet speed. Compare 3G, 4G, 5G, and fiber download times instantly. 100% client-side.

Fraction Calculator

Add, subtract, multiply, and divide fractions with step-by-step solutions. Simplify results instantly. Supports mixed numbers and improper fractions. 100% free.

Decimal to Fraction Calculator

Convert any decimal number to a simplified fraction instantly. Get step-by-step conversion, mixed number format, and percentage equivalent. Free and private.

HTML to Text

Paste HTML code and instantly extract clean plain text. Removes all tags, scripts, styles, and comments. 100% client-side.

HTTP Status Code Reference

Complete reference guide for all HTTP status codes (1xx, 2xx, 3xx, 4xx, 5xx). Search, filter, and understand every response code with explanations, common causes, and solutions.

Image Rotator & Flipper

Rotate and flip images online for free. Rotate 90°, 180°, 270°, or any custom angle. Flip horizontally or vertically. 100% client-side — your images never leave your device.

Overtime Pay Calculator

Calculate overtime pay instantly. Enter your regular hourly rate and hours worked to see total earnings with overtime breakdown. Supports multiple overtime rules including time-and-a-half and double time.

Ring Size Converter

Free online ring size converter. Convert between US, UK, EU, Japan, China, and India ring sizes. Visual ring sizer, measurement guide, and printable ruler included.

Shoe Size Converter

Free online shoe size converter. Convert between US, UK, EU, CM (Japan), and AU shoe sizes. Complete size charts for men, women, and kids.

SEO Meta Tag Analyzer

Analyze and generate SEO meta tags for your website. Check Open Graph, Twitter Cards, title, description and get instant SEO score. Free online SEO audit tool.

Keyword Density Checker

Analyze keyword density, word frequency, and content optimization for SEO. Paste your text to discover top keywords, their density percentages, and stop-word filtering. Free, instant, and 100% client-side.

Syllable Counter

Count the number of syllables in any English text instantly. Get word-by-word breakdown, average syllables per word, and identify multi-syllable words. 100% client-side.

Decision Maker

Can't decide? Get instant Yes, No, or Maybe answers with our free online decision maker. Features Magic 8-Ball mode, custom options, statistics tracking, and smooth animations.

Memory Game

Free online memory card matching game. Flip cards, find pairs, and train your brain. Multiple difficulty levels, emoji themes, and progress tracking. No signup needed.

Minesweeper

Play the classic Minesweeper game online for free. Clear the minefield without detonating any bombs. Three difficulty levels, timer, and flag counter. No downloads needed.

Snake Game

Play the classic Snake game online for free. Navigate the snake, eat food, grow longer, and avoid hitting walls or yourself. Multiple speeds, score tracking, and mobile-friendly controls.

2048 Game

Play 2048, the addictive number puzzle game. Slide tiles, merge numbers, and reach the 2048 tile. Free, no signup, works on desktop and mobile.

Tetris

Play the classic Tetris block puzzle game online for free. Stack falling blocks, clear lines, and survive as long as you can. Keyboard and mobile touch controls.

Maze Generator

Generate random mazes instantly online. Choose difficulty and size, solve interactively, print or download as PNG. Free, no signup required.

Rock Paper Scissors

Play the classic Rock Paper Scissors game online for free against the computer. Track your wins, losses, and streaks. No downloads, no signups — instant fun.

Website Ping Test

Check if any website is online and measure its response time instantly. Free uptime checker with visual status indicators and ping history. 100% client-side, no data sent to servers.

Invisible Character Detector

Detect invisible, zero-width, and hidden Unicode characters in any text. Spot malicious hidden characters, zero-width spaces, and non-printable control characters instantly. 100% private, works offline.

Moon Phase Calculator

Calculate the moon phase for any date. View the lunar phase name, illumination percentage, moon age, and a 7-day moon calendar. Pure client-side.

Online Ruler

Free online screen ruler in centimeters and inches. Calibrate to your display DPI for accurate real-world measurements. No downloads needed.

Word Scramble

Play Word Scramble game online for free. Unscramble letters to find hidden words, track your score and streaks, or use the solver to decode any jumbled letters. No downloads needed.

Hangman

Play the classic Hangman word guessing game online for free. Guess the hidden word letter by letter. Choose from multiple categories and difficulty levels. No downloads, no signups — just instant fun.

UTM Campaign URL Builder

Build UTM-tagged tracking URLs for your marketing campaigns. Generate campaign links with source, medium, term, content parameters. Export to CSV.

Unit Price Calculator

Calculate the unit price of products to compare deals and find the best value. Enter price and quantity for two items to see which is cheaper per unit. 100% free.

What Is My IP?

Instantly find your public IPv4/IPv6 address. Simple, fast, and 100% free. No signup required.

Paint Calculator

Calculate exactly how much paint you need for any room. Enter dimensions, doors, windows, and coverage to get gallons required with waste factor. Free online tool.

Wind Chill Calculator

Calculate the wind chill index to know how cold it really feels outside. Enter temperature and wind speed to get the perceived temperature and frostbite risk level. Free online tool.

Protein Calculator

Calculate your daily protein needs based on weight, activity level, and fitness goals. Get personalized protein recommendations with food source examples. Free online tool.

Word Cloud Generator

Turn any text into a stunning visual word cloud. Customize colors, shapes, and fonts. Filter stop words automatically. Download as PNG or SVG. Pure client-side — no data leaves your browser.

Hourly Rate Calculator

Calculate your freelance or consulting hourly rate based on target annual income, taxes, business expenses, and profit margin. Visual income breakdown. Free online tool.

Voice Recorder

Record voice and audio instantly in your browser. No downloads, no signups, no data collection. Click record, speak, stop, and download your audio file. Free and private.

Random Sentence Generator

Generate natural, readable English sentences instantly. Perfect for creative writing prompts, language learning, placeholder text, and testing. 100% client-side.

Sample Size Calculator

Free online sample size calculator for research and surveys. Calculate the required sample size for mean estimation or proportion estimation. Choose confidence level, margin of error, and population characteristics. Instant results, pure client-side.

To-Do List

Simple and powerful online to-do list manager. Add, complete, and organize tasks with local storage. No account needed.

Handwriting Converter

Convert typed text into realistic handwriting images. Choose from multiple handwriting fonts, customize paper style, ink color, and download as PNG. Perfect for notes, assignments, and creative projects.

Word & Character Counter

Free online word counter and character count tool. Get instant text statistics including word count, character count, reading time, keyword density analysis, and more. Perfect for writers, students, and SEO professionals.

PayPal Fee Calculator

Calculate PayPal transaction fees instantly. See how much you will receive after fees or how much to send so the recipient gets the full amount. Pure client-side.

Social Media Image Size Guide

Complete reference for social media image dimensions in 2026. Find optimal sizes for Instagram, Facebook, Twitter, YouTube, LinkedIn, TikTok, and Pinterest. One-click copy.

Sales Commission Calculator

Calculate sales commission instantly. Enter sales amount and commission rate to see your earnings. Supports flat and tiered commission structures. Free, private, no registration.

Blood Pressure Calculator

Enter your systolic and diastolic blood pressure readings to instantly see your BP category (Normal, Elevated, Hypertension Stage 1/2, or Crisis) and get actionable health advice. 100% client-side.

Dew Point Calculator

Calculate the dew point temperature instantly from air temperature and relative humidity. Understand comfort levels and condensation risk. Pure client-side.

Binaural Beats Generator

Generate free binaural beats instantly in your browser. Choose from Delta, Theta, Alpha, Beta, and Gamma brainwave presets for meditation, sleep, focus, and relaxation. Pure client-side, no downloads.

Tally Counter

A simple, free online tally counter. Click to increment, decrement, or reset. Perfect for counting people, items, scores, laps, and more.

Rule of 72 Calculator

Estimate how long it takes to double your investment using the Rule of 72. Enter an annual interest rate to see the approximate doubling time. Reverse mode also available. Pure client-side, instant results.

Special Characters

Browse, search, and copy 1,000+ special characters, Unicode symbols, emojis, math signs, arrows, currency symbols, and more. Free, fast, and instant copy-paste.

Breadcrumb Schema Generator

Generate Schema.org BreadcrumbList JSON-LD structured data for Google rich snippets. Build breadcrumb navigation markup instantly. Free, client-side, no data sent to servers.

FAQ Schema Generator

Generate Schema.org FAQPage JSON-LD structured data instantly. Add FAQ rich snippets to your website for better Google search results. Free, client-side, no API needed.

Review & Rating Schema Generator

Generate Schema.org Review + AggregateRating JSON-LD structured data instantly. Add star ratings to Google search results for higher CTR. Free, client-side, no API needed.

Random Date Generator

Generate random dates within any range. Perfect for testing, scheduling, and data generation. 100% free online tool.

HowTo Schema Generator

Generate Google-ready HowTo structured data (JSON-LD) for your step-by-step guides. Boost SEO with rich snippets instantly.

Confidence Interval Calculator

Calculate statistical confidence intervals for sample means and proportions. Choose confidence level, input sample data, and get results with visualizations.

Military Time Converter

Convert between military time (24-hour format) and standard time (12-hour AM/PM format). Instant conversion, no signup required. Pure client-side.

Image to Text Converter

Extract text from images instantly using OCR. Upload any image and convert it to editable text. 100% client-side, private, and free.

Tournament Bracket Generator

Create professional single-elimination tournament brackets online. Enter team or player names, generate a printable bracket, and track winners round by round. Perfect for sports, esports, gaming, and office competitions.

Salary Calculator

Convert between annual salary, monthly salary, weekly wage, daily wage, and hourly rate. Estimate take-home pay after taxes for US, China, UK, and EU. Pure client-side.

Density Calculator

Calculate density instantly from mass and volume. Supports kg/m³, g/cm³, lb/ft³, and more. Includes reference table for 50+ common substances. Pure client-side.

Margin of Error Calculator

Free online margin of error calculator. Calculate confidence intervals for survey data. Supports 90%, 95%, 99% confidence levels. Perfect for students, researchers, and data analysts.

Website Speed Test

Test your website speed instantly. Measure page load time, TTFB, DOM ready, and resource loading with the browser Performance API. No server required — pure client-side testing.

Add Line Breaks

Automatically add line breaks after sentences in your text. Handles abbreviations, quoted text, and CJK punctuation. Free, instant, and 100% client-side.

List Style Generator

Generate CSS list styles with live preview. Choose from standard bullets, numbers, emojis, custom images, and more. Copy the CSS code instantly. Pure client-side.

Log Calculator

Calculate logarithms with any base, natural log (ln), and common log (log10). Includes logarithmic properties, change of base formula, and step-by-step explanations.

Lorem Ipsum Generator

Generate professional Lorem Ipsum placeholder text instantly. Control paragraphs, sentences, and words. Copy as plain text or HTML. Perfect for designers, developers, and content creators.