Developer utility

Number Base Converter

Convert between binary, octal, decimal, and hexadecimal. Type in any field — the others update live. Supports big integers.

Binary (base 2, 0b…)

Octal (base 8, 0o…)

Decimal (base 10)

Hexadecimal (base 16, 0x…)

Underscores, commas, and spaces in the input are ignored, so 1010_0110 and 1,000,000 work. Prefixes 0b, 0o, 0x are accepted.