exchangerate.devPaste one iframe into your site to add a free currency converter. Visitors can change the amount and currencies inside the widget, and you need no API key.
Add the converter to your page
Paste the code below into a page that allows iframes, such as a custom HTML or embed block in a page builder. The frame has 100% width, a height of 380 pixels, no border and a maximum width of 420 pixels.
<iframe src="https://exchangerate.dev/embed/converter?from=USD&to=EUR&amount=100" title="Currency converter" width="100%" height="380" style="border:0;max-width:420px" loading="lazy"></iframe>Choose the starting settings
Set from and to to three-letter currency codes, and amount to a number. The defaults are USD, EUR and 100. An unlisted currency code falls back to the default; an amount outside the allowed range falls back to 100.
Choose auto, light or dark for theme. The default, auto, follows the visitor's system setting. For lang, use en, ar, es, id, ja, ko, pl, th, tr or zh; the default is en.
| parameter | meaning | default |
|---|---|---|
from | Source currency as a three-letter code | USD |
to | Target currency as a three-letter code | EUR |
amount | Starting amount to convert | 100 |
theme | Theme, with auto based on the visitor's system setting | auto |
lang | Language used by the widget | en |
Rates and visitor controls
The frame loads a rate once, 15 minutes behind the market, and prints its timestamp in UTC. Reload it for a newer rate. It does not refresh by itself.
Currency lists show codes such as USD and EUR. Visitors can change the amount, select either currency or swap them. These actions run in the browser and make no request.
When to call the API
Use the API for your own interface, live rates on paid plans, history or conversions inside your code. The Free plan has 5,000 requests a month and 10 requests a minute.