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Number Base Converter Binary, Octal, Decimal, Hex & Two's Complement

Convert numbers between binary, octal, decimal, hexadecimal and base 36 with arbitrary precision. Inspect 8, 16, 32 and 64-bit two's complement views and flip individual bits.

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Edit any field. Values are held as arbitrary-precision integers, so numbers well past 2⁵³ stay exact.

Binary · 0b

Octal · 0o

Decimal

Hexadecimal · 0x

Base 36

Custom base

Value

uppercase letters group digits

Fixed-width views

Click any bit to flip it.

8-bit

16-bit

32-bit

64-bit