Base Converter

Convert between binary, octal, decimal and hex with no size limit using BigInt.

How to use

Enter a number, pick the base it is written in, then press Convert. You get the value in all four bases plus a nibble-grouped binary view and the bit length.

FAQ

Digits are accumulated with BigInt arithmetic, so values far beyond 64 bits convert exactly with no floating-point rounding. Prefixes such as 0x, 0b and 0o are accepted, and an invalid digit is reported by name instead of being silently skipped.

Privacy: every calculation runs inside your browser. Your files and text never leave your device.