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Number Base Converter

Convert numbers between binary, octal, decimal, and hexadecimal. Results update as you type.

Input base

Enter a numberSupports 0b, 0o, 0x prefixes for auto-detection

About Number Base Conversion

Supports arbitrarily large numbers using BigInt — no precision loss.
Use prefixes for quick input: 0b for binary, 0o for octal, 0x for hex.
Underscores in input are ignored for readability (e.g. 1_000_000).
Everything runs in your browser — no data is sent over the network.