The Privacy Risk With Online Tools
Most free online converters work by uploading your file to a server, processing it, and sending it back. Your file lives on a stranger's server — sometimes for hours or days. For sensitive documents (contracts, IDs, financial records), that's a real risk.
Client-Side Processing: The Safer Alternative
Some tools — including FreeMediaKit — process files entirely in your browser using JavaScript. Your file never leaves your device. There's nothing to intercept, nothing stored on a server, nothing to breach.
How to Check If a Tool Is Client-Side
- Turn off your Wi-Fi after uploading — if the tool still works, it's local.
- Check the network tab in browser DevTools. No file upload request = client-side.
- Read the privacy policy. Look for "we do not store" or "processed locally."
Red Flags in Online Converters
- No privacy policy or vague storage claims.
- Requires sign-up to download your own file.
- Progress bar takes seconds for a file that should be instant.
💡 For truly sensitive documents, use a local desktop app (LibreOffice, GIMP) or a verified client-side browser tool.