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Number Base Converter

Binary / Octal / Decimal / Hex, with a quick conversion tester.

Convert numbers between number bases: binary (2), octal (8), decimal (10), and hexadecimal (16).

How to use Number Base Converter

  1. Enter a number in one base.
  2. See the equivalent values in the other bases.

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🔒 Number Base Converter runs entirely in your browser — the data you enter is not sent to any server. Free, no sign-up required. See145 free dev tools more.