Binary (base 2), Octal (base 8), Decimal (base 10), and Hexadecimal (base 16). Enter a value in any field and the others update automatically.

Yes. The tool accepts 0b for binary, 0o for octal, and 0x for hex. You can also enter plain digits without prefixes.

Yes. All conversion is done locally in your browser with pure JavaScript. No data is sent to any server.