Currency Converter
Convert any amount between 200+ world currencies using daily reference rates from 84 central banks. See the current rate, the inverse rate, and a 30-day trend.
api.frankfurter.dev, an open-source API that aggregates data from 84 central banks and official sources covering 201 currencies. If that API is unreachable, the tool falls back to open.er-api.com. Rates are indicative mid-market values, not the rate your bank or card provider will give you.
Finding This Currency Converter Useful?
Get the standalone version — a single HTML file you can keep on your machine and open anytime.
Get the Standalone VersionWhat Is a Currency Converter?
A Currency Converter takes an amount in one currency and expresses it in another using the current exchange rate. The rate is the price of one currency in terms of another — how many euros one US dollar buys, for example. This tool uses daily reference rates published by central banks and official sources, aggregated by the Frankfurter API, which covers 201 currencies. It shows the direct rate, the inverse rate, and a 30-day trend chart.
Key Features
200+ Currencies
From USD, EUR, GBP and JPY to less common currencies like the Icelandic Krona, Vietnamese Dong or Kenyan Shilling.
30-Day Trend Chart
A sparkline showing how the exchange rate has moved over the past month, so you can judge whether now is a good time to convert.
One-Click Swap
Reverse the conversion direction instantly. The swap button rotates the from/to currencies and updates the result.
Searchable Currency List
Type a currency code or name to filter the list — useful when you need a currency not in the common-pairs shortcuts.
Copy & Export
Copy the conversion as text, or download a JSON file with the amount, rate, date and both currencies.
How to Use the Currency Converter
- Enter an amount — type a number or tap one of the quick-amount buttons.
- Choose the source currency — pick from the list, or type in the search box to filter.
- Choose the target currency — the same way. Use the swap button to reverse if needed.
- Click Convert — or just change any field; the tool re-converts automatically after a short pause.
- Read the result — the converted amount is shown in large type, with the rate, inverse rate and rate date below.
- Check the trend — the 30-day chart shows whether the rate is rising or falling.
Practical Use Cases
Trip Budgeting
Convert hotel, food and transport costs into your home currency before you travel.
Online Shopping
See what a price in a foreign store actually costs in your currency, before checkout.
Freelance Invoicing
Convert a client's payment into your local currency to check whether the rate is fair.
Expense Reports
Convert foreign receipts into your reporting currency for accounting purposes.
Important Notes and Limitations
A few honest caveats before you rely on a rate for a real transaction:
• These are reference rates, not transaction rates. Banks, card issuers, and exchange bureaux add a margin on top — often 1-4% — so the rate you actually get will differ.
• Rates are updated daily, not in real time. The Frankfurter API publishes reference rates once per working day based on central bank data.
• Weekends and holidays may show stale rates. Reference rates are not published on non-working days, so a Saturday conversion may use Friday's rate. The rate date field tells you which day the rate is from.
• Some currencies are not covered. The Frankfurter API covers 201 currencies. If the API fails entirely, the tool falls back to open.er-api.com, which has a different coverage list.
• No conversion history is sent to any server. The recent conversions list is stored only in your browser's localStorage.
Frequently Asked Questions
The primary source is the Frankfurter API (api.frankfurter.dev), an open-source project that aggregates daily reference rates from 84 central banks and official sources, covering 201 currencies. If that API is unreachable, the tool falls back to open.er-api.com. Both are queried directly by your browser; no intermediate server is involved.
No. The rate shown is the mid-market rate — the midpoint between wholesale buy and sell prices. Banks, credit card issuers, and exchange services add a margin on top, typically between 1% and 4%. So the amount you actually receive will usually be a little lower. Use it as an estimate, not a guarantee.
The underlying reference rates are published once per working day. The tool fetches the latest available rate each time you convert. On weekends and public holidays, the most recent rate may be from the previous working day — the "rate date" field shows exactly which day the rate belongs to.
201 currencies are available from the primary API, covering all major and most minor currencies — USD, EUR, GBP, JPY, CNY, INR, BRL, ZAR, AUD, CAD, CHF, and many more. A few very small or pegged currencies may not be present.
No. The tool has no backend. Conversions are computed in your browser using rates fetched directly from the public API. The "Recent conversions" list is stored only in your browser's localStorage and is never transmitted to any server.
About the Author — GenieDevs
Get the Standalone Version
Currency Converter — Standalone Edition
One self-contained HTML file with the full converter inside. Keep it on your machine, open it from anywhere, and convert between 200+ currencies without a sign-up.
Final Takeaway
Whether you are budgeting a trip, checking the real cost of an online purchase, or invoicing a client in another currency, you need a number you can trust — and a sense of whether the rate is moving in your favour. This converter gives you both, in one page, without a sign-up. The rates come from central bank data and are as accurate as reference rates get. Just remember that the rate you actually receive will be slightly worse once your bank adds its margin.