Privacy

This is not a marketing claim — it's an architectural fact. There is no upload endpoint on this site. All conversion happens in your browser using the Canvas API and WebAssembly.

What we don't do

• We don't upload your files anywhere.
• We don't use Google Analytics, Meta Pixel, or any third-party tracker.
• We don't set tracking cookies.
• We don't load fonts, scripts, or images from third parties.
• We don't show ads.
• We don't have user accounts.
• We don't store anything about you, locally or otherwise.

Verify it yourself

1. Open your browser's DevTools and select the Network tab.
2. Drop in a file and convert it.
3. You'll see zero outbound requests during conversion.

A note on the service worker

We install a service worker so the site works offline after your first visit. It only caches a → b's own assets (HTML, JavaScript, the WebAssembly conversion libraries) so the app is fast and usable without a connection. It never sees your files, never sends them anywhere, and only ever fetches from this domain. You can verify in DevTools → Application → Service Workers.

If we ever break this

Please open an issue on GitHub. The privacy promise is non-negotiable; any change that adds a tracker, third-party request, or upload endpoint would be a bug.