Number Base Converter

Enter a number in any base — decimal, hexadecimal, binary, or octal — and see instant conversions to all other bases. Leave the width on Auto for arbitrary-precision BigInt conversion, or pick 8, 16, 32, or 64 bits to read the value as a fixed-width integer: signed two's complement or unsigned, with zero-padded hex and grouped binary. Copy any result with one click. Everything runs locally in your browser.