Web Converter — browser extension
Web Converter is a currency & crypto converter for Chromium browsers (Chrome, Brave, Edge). This page explains, in full, what data the extension touches and where it goes.
The extension keeps a small settings object in your browser's local extension storage (chrome.storage.local), which never syncs to any account or server:
| Stored | Purpose |
|---|---|
| Your selected currencies | Which 3–7 currencies appear in the popup |
| Your base currency | Which one is centered when the popup opens |
| Cached exchange rates | Avoids re-fetching rates on every popup open |
| Cache timestamp | Knows when to refresh (every 15 minutes) |
This data is local to your browser profile. Uninstalling the extension deletes it. It is not readable by websites, other extensions, or us.
When you select text on a webpage, the extension checks — entirely inside your browser — whether that text looks like a price (e.g. $1,099). If it does, it shows a small tooltip converting that amount into your other selected currencies.
That check happens locally. The selected text is never transmitted anywhere, logged, or stored — it exists only for the instant it takes to compute the tooltip, then it's gone.
To show real exchange rates and flag icons, the extension makes two kinds of outbound requests. Neither includes your identity, your selections, or anything you've typed — just a fixed URL.
| Service | What's requested | What's sent |
|---|---|---|
| cdn.jsdelivr.net | Exchange rate table & currency name list, refreshed every 15 minutes | A fixed file URL — no parameters, no identifiers |
| flagcdn.com | A flag image, when a country flag needs to render | A two-letter country code (e.g. us.svg) — no parameters, no identifiers |
These are standard, publicly-cacheable static assets. Like any external image or resource load in any browser, the request necessarily reaches the third party's servers over the network — we don't control their server logs, but nothing personally identifying is ever included in what's sent.
| Permission | Reason |
|---|---|
storage | Save your currency selection and cached rates locally |
alarms | Refresh exchange rates every 15 minutes in the background |
| Host access to jsdelivr & flagcdn | Fetch rate data and flag images (see §3) |
| Access to all sites (content script) | Detect a selected price and show the conversion tooltip, on whichever page you're reading |
The extension does not request tabs, browsing history, bookmarks, cookies, or any permission beyond what's listed above.
Web Converter is a general-purpose utility, not directed at children, and — per everything above — collects no personal data from anyone, of any age.
If this policy changes, the date below will update and the change will ship with a new extension version. There's no mailing list to notify because there's no data collected to notify anyone about.