🔢 Number Base Converter

Convert numbers between any base from 2 to 36. Real-time conversion with BigInt support for arbitrarily large numbers.

Input Base: or custom (2-36):

Number Input

Show signed binary (two's complement, 8/16/32/64-bit)

Binary (Base 2)

Octal (Base 8)

Decimal (Base 10)

Hexadecimal (Base 16)

Base 32

Base 36

Free Number Base Converter

Convert numbers between any radix from 2 to 36 instantly. Supports binary, octal, decimal, hexadecimal, base 32, and base 36 with simultaneous output in all bases. Uses JavaScript BigInt for arbitrarily large numbers with no precision loss. Binary output is grouped into 4-bit nibbles and hexadecimal into 2-character byte pairs for easy reading. Includes a signed/unsigned toggle that shows two's complement representation for binary values. All processing happens in your browser.