Your Files Never Leave Your Device. Ever.
Convert files without uploading. MixConvert processes files locally in your browser for complete privacy. No server uploads, no data retention, no tracking.
- ✓100% Local Processing — Files are converted entirely in your browser using WebAssembly.
- ✓Verifiable Privacy — Open your browser's Network tab and watch. Zero file uploads.
- ✓Works Offline — Once loaded, disconnect from the internet and still convert files.
How MixConvert Compares
| Converter | Uploads Your Files? | Data Retention | Works Offline |
|---|---|---|---|
| MixConvert | ❌ No Upload | N/A | ✅ Yes |
| Smallpdf | ✅ Yes (Server) | 1 hour | ❌ No |
| CloudConvert | ✅ Yes (Server) | 24 hours | ❌ No |
| Zamzar | ✅ Yes (Server) | 24 hours | ❌ No |
"As someone who handles confidential client documents, MixConvert is the only converter I trust. I verified it myself — nothing gets uploaded.
Frequently Asked Questions
How do I verify my files aren't being uploaded?▼
Open your browser's Developer Tools (F12), go to the Network tab, and watch while converting a file. You'll see zero outgoing file transfers. This is definitive proof that your files stay local.
Is this really free with no limits?▼
Yes! Since we have no server processing costs, we can offer unlimited free conversions with no file size caps. No account required, no daily limits, no premium upsells.
What formats can I convert without uploading?▼
All of them! HEIC to JPG, PDF to Word, MP4 to MP3, and 500+ other format combinations — all processed locally in your browser using WebAssembly technology.
Does this work on mobile devices?▼
Yes! MixConvert works on any device with a modern browser — iPhone, Android, iPad, tablets. The same local processing happens on mobile, just visit the site in Safari or Chrome.
Can I use this for sensitive business documents?▼
Absolutely. Client-side processing is ideal for confidential documents — legal contracts, medical records, financial statements. Since files never leave your device, there's no third-party access to worry about.
Ready to Convert?
100% free. No watermarks. No file uploads. Your files never leave your device.
Convert Files Now — No Upload →