Currency Converter

Convert across 160+ currencies at live rates with a quick-reference table; rates fetched + cached server-side.

A free live currency converter covering 160+ currencies, with a historical rate trend chart. Enter an amount, pick a source and target currency, and it converts — plus a quick-reference table that shows the source currency at several common round amounts across multiple targets (amounts auto-scale to the currency, e.g. VND starts in the thousands). Rates are fetched daily from a free public source and cached by the Zapbox server; every conversion runs locally in your browser, so amounts are never uploaded.

How to use

1. Enter an amount and pick the source currency on the left.
2. Pick the target currency on the right; the result updates live. The middle button swaps the two.
3. Use the quick-reference table to compare amounts across targets; add or remove target columns.

FAQ

Are the rates real-time? How often do they update?

Rates come from a free public source, refreshed about once a day and cached by the Zapbox server. That is plenty for everyday conversions; tick-level real-time quotes need a paid market feed and are not included.

Is the amount I type uploaded?

No. The server only provides a single USD-based rate table; all currency-pair math happens locally in your browser from that table, so the amount never leaves your device.

How are the quick-reference amounts chosen?

They are scale-aware round numbers based on the source currency: a strong currency starts at 1 / 2 / 5 / 10, while a low-unit currency like VND starts in the thousands (10k / 50k / 100k …). Your current amount is also inserted as a highlighted row.

Which currencies does the trend chart support, and where is the data from?

The chart prefers Frankfurter (ECB open data, ~30 major currencies, stable) and automatically falls back to Yahoo Finance for the rest (e.g. VND) — both free and keyless. Almost all common pairs have monthly/yearly trends; a few rare currencies may have no history and show “No trend data”.

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