Number Base Converter Online — Free & Private

A free edge API by formatho.com, privacy-first developer tools.

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Free, no signup, runs entirely in your browser — your data never leaves your device.

🔓 Free🔒 Zero tracking🚫 No data collection⚡ Edge-fast

Usage

curl "https://base-converter-formatho.filesformatho.workers.dev/api?value=255&from=10"

Returns binary, octal, decimal, hexadecimal and base36 in one response. Add &to=5 for any base 2-36.

curl "https://base-converter-formatho.filesformatho.workers.dev/api?value=deadbeef&from=16&to=36"

Full parameter reference: /api endpoint.

Privacy-first: numbers are converted in-memory at the edge and never logged or stored. Works with arbitrarily large integers (BigInt).

Full browser tool

Convert bases entirely client-side: Integer Base Converter on formatho.com.

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