somefreetools.com

Number Base Converter

Convert integers between binary, octal, decimal, hexadecimal, and any base from 2 to 36 — including numbers far beyond 64-bit. Everything runs in your browser.

Binary (base 2)11111111
Octal (base 8)377
Decimal (base 10)255
Hexadecimal (base 16)ff
Custom (base 36)73

How to use this tool

  1. Enter a number and pick which base it is in.
  2. View the value converted to binary, octal, decimal, and hexadecimal instantly.
  3. Use the custom base field for any base from 2 to 36.
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