This tool runs entirely in your browser. We don't have a server, an account system, or any tracking of what you convert. Nothing you type is logged.
Your browser remembers your last-used category and units locally (using localStorage), purely so the tool opens where you left it next time. This stays on your device — it's never sent to us or anyone else. You can clear it any time using the Reset button.
The Currency category fetches live exchange rates from a third-party service, Frankfurter (frankfurter.dev), which sources data from the European Central Bank. This request happens directly from your browser to their server, which means Frankfurter (or their infrastructure provider) may see your IP address, in line with their own privacy practices. No other category makes any external request.
If ads are shown on this site, the ad provider may use cookies or similar technology to serve ads, in line with their own privacy policy. If that changes, we'll update this notice and ask for consent where required.
About
A straightforward unit converter covering length, weight, temperature, volume, speed, area, digital storage, pressure, energy, power, time, angles, fuel economy, currency and precious metals (troy weight). Pick a category, choose your units, type a value.