Number Base Converter
Bin / Oct / Dec / Hex
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About the Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal with strict validation and prefixed output (0b, 0o, 0x). Also shows how many bits and bytes the value needs — handy for bitmasks, permissions, color values, and low-level debugging.
How to use
- 1Type a number and select its base.
- 2Read all four base conversions instantly.
- 3Copy any representation.
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Number Base Converter is part of DevKit — 100 free, privacy-first tools for developers, students, and everyone, built by Minhazul Ashim. Everything runs in your browser; your data never leaves your machine.