Convert between Binary (2), Octal (8), Decimal (10), and Hexadecimal (16) instantly. Free, private, no server upload.
Number Base Converter is a free online tool that instantly converts numbers between Binary, Octal, Decimal, and Hexadecimal number systems. All conversions happen locally in your browser — no data is ever sent to a server.
A number base (or radix) is the number of unique digits — including zero — used to represent numbers in a positional numeral system. Decimal (base 10) uses digits 0–9, Binary (base 2) uses 0–1, Octal (base 8) uses 0–7, and Hexadecimal (base 16) uses 0–9 and A–F.
Simply enter your binary number, select "Binary" as the source base, and the tool will instantly show the decimal equivalent along with octal and hexadecimal conversions.
Hexadecimal is widely used in computing and digital systems because it provides a human-friendly representation of binary-coded values. It is commonly used for memory addresses, color codes in web design (e.g., #FF0000), and MAC addresses.
Yes, Number Base Converter is completely free. All processing happens in your browser, so your data never leaves your device.