Binary Converter
Convert between binary, decimal, and hex.
About Binary Converter
Convert numbers between binary, decimal, hexadecimal, and octal bases. Computers represent everything in binary, while programmers frequently switch between decimal for everyday values, hex for colors and memory addresses, and octal for permissions, and doing those conversions by hand is slow. Enter a value in any base and this tool instantly shows its equivalent in the others, making it a handy reference while coding, studying computer science, or debugging low-level data. The conversions are computed locally in your browser, so nothing you enter leaves your device, and the tool is completely free with no signup, letting you convert as many values as you like.
How to use this tool
- 1Type a number in any base: binary, decimal, hex, or octal.
- 2All other bases update instantly.
- 3Copy the representation you need.
Frequently asked questions
How large can the numbers be?
Arbitrarily large; the converter uses BigInt so precision is never lost, even beyond 64 bits.
Are negative numbers supported?
Yes, with a leading minus sign. Two's-complement bit patterns are not used.