Dev Tools

Base Converter

Convert numbers between binary, decimal, and hexadecimal.

Input
Base
Decimal
255
Hex
0xff
Binary
0b11111111
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About Base Converter

Convert numbers between binary, octal, decimal, hexadecimal, and arbitrary bases. A quick reference when working with bit masks, color values, or low-level protocols.

How to use

  1. Enter a number and its current base.
  2. Pick the target base (or several).
  3. Copy the converted values.

Frequently asked questions

Can I convert very large numbers?
Yes — conversions handle large integers beyond the usual 53-bit safe range.
Does it support custom bases?
Yes — in addition to 2, 8, 10, and 16 you can convert to other bases up to 36.