How It Works
"Your files never leave your device" is a big claim. Here's exactly how it works — and how to verify it yourself in two minutes.
The conversion runs in your browser
Traditional online converters upload your file to their servers, convert it there, and send the result back. That means your videos, photos, contracts and voice memos sit on someone else's computer.
This site works differently. The same professional tools that power desktop converters are compiled to WebAssembly and run inside your browser tab:
- FFmpeg — the industry-standard video/audio engine — handles every video, audio and GIF conversion on this site
Your file is read into your browser's memory, processed on your own CPU, and the result is saved straight to your Downloads folder. There is no upload — this site doesn't even have a server to upload to.
Verify it with DevTools
- Open your browser's developer tools (F12 or Cmd+Option+I) and switch to the Network tab.
- Convert any file on this site.
- Watch the requests: you'll see the site download its own code and the conversion engine — and nothing being sent out. No POST requests, no upload traffic, no third-party domains.
Or just go offline
The strongest proof: this converter works with no internet connection at all. Visit once, run one conversion (so your browser caches the engine), then turn on airplane mode and convert another file. It works — because nothing ever needed to reach a server in the first place.
What we never see
- Your files — they never leave your device
- Your file names, sizes or types — processing is local
- No analytics scripts, no tracking pixels, no cookies required