Converter

Number Base Converter

Convert integers between binary, octal, decimal, and hexadecimal. Type in any box to see the conversions instantly.

Decimal (Base 10)

Hexadecimal (Base 16)

Binary (Base 2)

Octal (Base 8)

Prefixes and Large Numbers

You can optionally use standard prefixes like 0b for binary, 0o for octal, and 0x for hexadecimal.

This tool uses BigInt under the hood, allowing you to convert arbitrarily large integers without precision loss.