ASCII Table

Gratuit online ASCII table reference. Searchable ASCII character chart with decimal, hex, octal, binary values, printable characters, and control codes. Pure côté client, no data sent to servers.

Showing 256 characters

Decimal	Hex	Octal	Binary	Char	Description

About ASCII Table

Our ASCII Table tool provides a complete, searchable reference for all 256 ASCII and Extended ASCII characters. Whether you are a developer debugging character encoding issues, a student learning about data representation, or a hobbyist exploring control codes, this tool gives you instant access to decimal, hexadecimal, octal, and binary values for every character — all in your browser with no data sent to any server.

Features

Complete ASCII chart covering all 256 codes (0-255)
Search by character, decimal value, hex, octal, binary, or description
Filter by category: All, Printable, Control Codes, or Extended ASCII
One-click copy of any decimal code to clipboard
Color-coded rows: orange for control codes, purple for extended
100% client-side — no data ever leaves your device

How to Use

Open the table to see all 256 ASCII characters loaded instantly.
Use the search box to find a specific character by name, code, or value.
Click filter buttons to show only Printable, Control, or Extended characters.
View Decimal, Hex, Octal, and Binary values side by side.
Click the copy button next to any row to copy the decimal code.
Hover over rows to highlight and read full descriptions.

Use Cases

Developers debugging text encoding and charset issues in applications.
Students learning about binary, hex, and character encoding fundamentals.
System administrators working with control characters in terminal scripts.
Embedded programmers mapping serial communication protocols.
Web developers ensuring proper character handling in HTML and JavaScript.
Security researchers analyzing non-printable characters in payloads.

FAQ

What is the difference between ASCII and Extended ASCII?

Standard ASCII defines 128 characters (0-127), including control codes and printable English letters, numbers, and symbols. Extended ASCII adds 128 more characters (128-255) that include accented letters, box-drawing characters, and other symbols used in various languages and applications.

Why do some characters show as empty boxes?

Control characters (codes 0-31 and 127) and some extended ASCII characters do not have a visible glyph. They are used for formatting, communication protocols, or may not be supported by your current font.

Is Extended ASCII standardized?

There is no single official Extended ASCII standard. Codes 128-255 vary across different encodings like Windows-1252, ISO-8859-1, and Mac OS Roman. Our table shows the most common interpretations.

Can I copy values directly from the table?

Yes! Click the copy button in any row to copy the decimal code to your clipboard instantly.