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Pedro Ivotools

Number Base Converter

Convert numbers between binary, octal, decimal and hexadecimal, with exact results for arbitrarily large integers.

Local calculation
The result is calculated in your browser.
Private by default
Nothing you enter leaves your browser.
Binary
11111111
Octal
377
Decimal
255
Hexadecimal
FF

How it works

Values are parsed into JavaScript BigInt, so even numbers far beyond 2^53 convert exactly. Prefixes such as 0x, 0b and 0o, underscores and spaces are accepted.

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