Convertio is a versatile online converter that handles hundreds of formats — images, documents, audio, video and more. Privatool covers the most common conversions, but with one crucial difference: everything runs inside your browser, so your files are never uploaded. Here's how they compare.
Side-by-side comparison
| Feature | Privatool | Convertio |
|---|---|---|
| Image format conversion (JPG/PNG/WebP) | ✅ Client-side | ✅ Server-side |
| PDF ↔ image | ✅ Client-side | ✅ Server-side |
| Exotic formats (video, audio, ebooks) | ❌ | ✅ 300+ formats |
| Files uploaded to server | ❌ Never | ✅ Yes |
| Free file size limit | Limited only by your RAM | 100 MB |
| Free daily conversions | Unlimited | 10 files/day |
| Account required | ❌ Never | ❌ (limited) |
| Works offline | ✅ After first load | ❌ |
Where your file actually goes
Convertio uploads your file to a cloud server, converts it there, and offers the result for download. Their policy is to delete files after 24 hours, but the file still leaves your device and sits on a third-party machine in the meantime.
Privatool converts using JavaScript and WebAssembly running in the page itself. For a JPG-to-PNG or PDF-to-image conversion, the bytes never leave your RAM — a difference you can verify by watching your browser's Network tab.
When to choose Convertio
- You need to convert video, audio, ebook, or CAD formats Privatool doesn't support
- You're converting between two rare formats and need maximum coverage
- The file is huge and your device is low-powered
When to choose Privatool
- Your files are private, confidential, or client work
- You do frequent image or PDF conversions and hit Convertio's 10/day free cap
- You want instant conversion with no upload wait
- You're offline or on a locked-down network
Bottom line
For the everyday image and PDF conversions most people need, Privatool does it privately and without daily limits. Convertio remains the tool to reach for when you need its enormous catalog of exotic formats.