Temperature Converter API — Free & Private

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

Open the full browser tool →

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

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

Usage

# 100 °C to Fahrenheit
curl "https://temperature-converter-formatho.filesformatho.workers.dev/api?value=100&from=c&to=f"

# 25 °C in every unit (omit 'to')
curl "https://temperature-converter-formatho.filesformatho.workers.dev/api?value=25&from=celsius"

Units: c/celsius/centigrade, f/fahrenheit, k/kelvin, r/rankine (case-insensitive). Every response includes the value in all four scales, and values below absolute zero are rejected.

Full parameter reference: /api endpoint.

Privacy-first: conversions are computed in-memory at the edge and never logged or stored.

Full browser tool

Convert temperatures entirely client-side: Temperature Converter on formatho.com.

All Formatho edge APIs

Browse every free Formatho Worker tool on the Formatho Tools index.