Number Base Converter

Name: Number Base Converter
Rating: 5 (26 reviews)

Convert numbers between Binary, Octal, Decimal, and Hex.

Show prefixes (0b / 0o / 0x)Uppercase hex

Group digits

Applied per-base (bin/hex usually 4, oct 3, dec 3).

Pad to bit width

Padding applies to non-negative values.

Quick examples

Binary

Octal

Decimal

Hexadecimal

Tips: inputs accept underscores (1_000_000) and optional prefixes (0b, 0o, 0x). Conversion uses BigInt for virtually unlimited size.