ConvertHub

Does ConvertHub upload my files?

No. Your files are processed by your browser and never sent to our servers.

youtheir server

— most converters: your file leaves your device

your browser

— ConvertHub: your file never leaves your device

What we do download

The conversion engine each tool needs — a small WebAssembly library — downloads once, then is cached by your browser for next time. The processing state for each tool shows "engine ready · cached" once this has happened.

Verify it yourself

  1. Open your browser's DevTools (F12, or Cmd+Option+I on Mac) and go to the Network tab.
  2. Run any conversion on this site.
  3. Look for a request carrying your file's bytes to any host other than this page — there isn't one.
  4. Or simpler: turn off Wi-Fi after a tool has loaded once, and run the conversion again.

What enforces it

A Content-Security-Policy of connect-src 'self' plus the engine CDN blocks the page from making any other network request, even if a bug tried to. The byte counter behind the privacy pill above wraps every fetch, XMLHttpRequest, WebSocket and sendBeacon call on this page and counts any request body containing file data — it isn't just a badge, it's a live measurement.

What we do collect

Page-level analytics (which pages are visited, in aggregate) — never file names, file contents, or anything you type into a tool.

FAQ

Where are my saved signatures stored?

In your browser's local storage, on this device only. They're never sent anywhere, and clearing your browser data removes them.

Does ConvertHub work offline?

Yes, once a tool's conversion engine has loaded and been cached. Turn off Wi-Fi after your first visit to a tool and try it again.

Is there a file size limit if nothing uploads?

The limit is your device's memory, not a server queue. Very large video files can still be slow to process in a browser tab — that's a browser limitation, not a network one.

What does the browser extension send anywhere?

Nothing file-related. It requests only the permissions needed to read a file you right-click and open it in the same in-browser engines used on the site.