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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.
Arbitrary-precision via BigInt — convert numbers of any length.
🔒 This tool runs entirely in your browser. Your data is never 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.