Why Browser-Based File Conversion Is Safer Than Tools That Upload Your Files
The Hidden Risk of Online File Converters
Most online converters work like this:
1. You select a file and click "Convert"
2. Your file is uploaded to their server
3. The server converts it
4. You download the result
What happens to your file after step 2? Do they delete it? Store it? Share it with third parties? In most cases, you don't know.
What Kind of Files Do People Convert?
- PDFs: Contracts, invoices, tax documents, medical records
- Images: Personal photos, ID scans
- Videos: Private recordings, business content
Uploading these to a random server is a significant privacy risk.
The Safer Alternative: Browser-Based Conversion
Using WebAssembly, Canvas API, and Web Audio API, modern browsers can perform complex file conversions entirely locally — no server involved.
This is how FileConvert works:
- You select a file → it stays on your device
- The browser runs the conversion locally
- You download the result directly
Benefits Compared
| Server-Based | Browser-Based |
|---|
| Files uploaded | Yes | No |
| Works offline | No | Yes |
| Privacy | Unknown | Guaranteed |
| Speed | Depends on server | Instant |
How to Verify
Open your browser's Network tab (F12 → Network) while converting. If you see a large upload, your file is being sent to a server. With FileConvert, you'll see no such upload.
Try it: PDF to JPG · HEIC to JPG · PNG to JPG · MP4 to MP3