Every calculator on this site runs entirely in your browser — nothing you type is ever sent anywhere. Our new currency converter is the one deliberate exception, and we want to be upfront about it instead of quietly blurring the line.
Converting between currencies depends on today’s exchange rate, and that’s not something a browser can know on its own — it has to ask a server. So this tool fetches live rates from Frankfurter, a free API that republishes the European Central Bank’s daily reference rates, and nothing else on the page changes: your amount and currency choices are sent to get a rate back, the same way any currency lookup on the web works, and nothing is stored.
What it does:
- Convert any amount between the currencies the ECB publishes rates for, with a swap button to flip the direction instantly.
- Rates update once a day, not tick-by-tick — we show the actual date the rate was published so it’s never ambiguous.
- Honest about its limits — great for a quick estimate or a sense of value, not a substitute for your bank’s live quote when you’re actually moving money.
The calculator is also embeddable on your own site with one iframe. Try it with the default USD → EUR pair, or pick any two currencies you need.