Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal instantly. Free developer calculator.
100% private
Number (base 10)
All bases
Auto-playing walkthrough — paste input, click convert, see the result
1 lines
Binary
11111111Octal
377Decimal
255Hexadecimal
FFHow to use Number Base Converter
- Enter a number in any supported base.
- Select the input base (binary, octal, decimal, hex).
- Copy any converted output format.
Frequently Asked Questions
- Are large numbers supported?
- Yes. Conversion uses BigInt for large integers within JavaScript safe limits.