How to Use Number Base Converter
Type a number in any base — binary, octal, decimal or hex — and see the others update instantly. Built on BigInt, so it handles numbers of any size without precision loss.
Open the Number Base Converter tool →What is Number Base Converter?
Convert numbers between binary, octal, decimal and hexadecimal with arbitrary precision. It's completely free, needs no sign-up, and runs entirely in your browser — so it's fast and private.
How to use Number Base Converter
- Open the Number Base Converter tool.
- Paste or type your input.
- Set any options provided.
- Copy the result. Everything runs in your browser — nothing is uploaded.
Frequently asked questions
Which bases are supported?
Binary (base 2), octal (8), decimal (10) and hexadecimal (16), converted in every direction.
Does it handle very large numbers?
Yes — it uses arbitrary-precision arithmetic, so big integers convert without rounding errors.
Can it convert fractional numbers?
It targets whole numbers. Fractional binary or hex values need bit-level handling that this tool doesn't cover.
Ready to try it?
Open Number Base Converter →