Number Base Converter
Conversion Results
Binary (Base 2)
Octal (Base 8)
Decimal (Base 10)
Hexadecimal (Base 16)
How to Use
Select the input number base, then type your number. The tool instantly converts it to all four bases (binary, octal, decimal, hexadecimal). Click the copy button next to any result to copy it to your clipboard.
Number Base Systems
A number base (or radix) defines how many unique digits are used to represent numbers. Binary (base 2) uses 0-1 and is fundamental to computing. Octal (base 8) uses 0-7. Decimal (base 10) uses 0-9 and is the standard human system. Hexadecimal (base 16) uses 0-9 and A-F, commonly used for colors, memory addresses, and byte values.
Privacy
All conversions happen entirely in your browser using JavaScript's BigInt for arbitrary precision. No data is sent to a server, stored, or logged.