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Number Base Converter

Convert between binary, octal, decimal and hexadecimal.

Runs locally · nothing uploaded

How to use this tool

  1. 1Paste your data in the source format.
  2. 2Click convert.
  3. 3Copy the result or download it as a file.

Frequently asked questions

What happens to the data I paste in?
It's processed in your browser and never uploaded. Refreshing the page clears it.
Can I use this on sensitive or private data?
Because nothing leaves your browser, these tools are a reasonable choice for sensitive data — though we'd still recommend not pasting real secrets like production passwords into any web page.

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