Number Base Converter

Convert numbers between binary, octal, decimal and hexadecimal.

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How it works

Enter a value in any base and the others update live. Handles binary, octal, decimal and hexadecimal.

Frequently asked questions

Is my data private?

Yes. The Number Base Converter runs entirely in your browser. Nothing you enter is uploaded, saved to a server, or shared — it never leaves your device.

Is the Number Base Converter free?

Yes, it is completely free with no sign-up, no limits and no watermarks. Like every tool on developer tools and the rest of the platform, you can use it as often as you like.