Currency Converter
Convert between 50 currencies entirely in your browser — enter today's rate and it converts both ways instantly, no network needed. Optional one-tap live-rate fetch. Deep-link any pair.
How to Use
- Pick a From and To currency — 50 currencies available.
- Enter the current exchange rate, or tap "Fetch live rate" to pull today's reference rate from a public API.
- Type an amount on either side — the other converts instantly, fully in your browser.
- Use the swap button to flip the pair; the rate inverts automatically.
- Shareable URL: add ?from=USD&to=EUR for any pair.
Built-in approximate rate — edit it, or tap Fetch live rate for today's. All conversion happens in your browser; nothing is sent until you fetch.
Show Work
Live currency converter
Convert between US Dollar (USD) and Euro (EUR) right in your browser. The conversion math is fully offline: enter the exchange rate (it starts with a built-in approximate value) and any amount converts both ways instantly — no network round-trip, nothing sent anywhere.
Want today's reference rate? Tap Fetch live rate — the one optional online action — and it pulls a single quote from frankfurter.dev (European Central Bank rates) with open.er-api.com as a fallback. 50 currencies are available, and any pair is shareable via ?from=X&to=Y in the URL.
Popular pairs
About the Currency Converter
The Currency Converter gives you a fast, free answer for personal-finance and money decisions without sending anything off your device. Convert between 50 currencies entirely in your browser — enter today's rate and it converts both ways instantly, no network needed. Optional one-tap live-rate fetch. Deep-link any pair.
How it works
Type a value, then pick what you want to change it into. The answer appears straight away. It all happens on your own device, so it is fast and nothing you type is sent away. Just check that you picked the right “from” and “to” so you get the answer you wanted.
Want the deeper story? The Knowledge Base explains the ideas behind the tools in more detail.
Frequently Asked Questions
Does this work offline?
Yes. The conversion math runs entirely in your browser using the rate shown, so once the page has loaded you can convert with no internet connection. The rate field starts with a built-in approximate value you can edit to the exact rate.
Where does the live rate come from?
Only if you tap "Fetch live rate." It then requests once from frankfurter.dev (European Central Bank reference rates) with open.er-api.com as a fallback. Nothing leaves your browser until you click that button.
Why is the starting rate slightly off?
The built-in rates are approximate defaults so the tool is useful the instant it loads. Enter the exact rate from your bank, or tap fetch for today's reference rate.
What about exchange spreads?
Banks and fintech apps add 1-3% on top of the reference rate. Divide the rate by about 1.02 for a more realistic consumer quote.
How do I use the Currency Converter?
Just type or paste your value. The answer shows up right away — there is no button to press. Change anything and it updates by itself.
Does it cost anything or need an account?
No. The tool is completely free, there is no account to create, and it keeps working offline after the page first loads.
Is anything I type uploaded?
No. The tool works entirely on your device, so the values you enter never leave your browser.
Common Use Cases
Travel budget
Set your home and destination currency, enter the rate, and play with amounts offline on the go.
Invoice cross-check
Sanity-check a vendor quote against a rate you enter or fetch.
Quick offline math
Convert any amount both ways without waiting on a network round-trip.
Deep-link a pair
Bookmark ?from=USD&to=EUR for quick reuse.
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