Converterzilla vs iLovePDF
A privacy-first iLovePDF alternative that never uploads your files. Honest comparison below — we win on privacy and limits, iLovePDF wins on breadth and brand.
When Converterzilla wins
- Confidential documents. Contracts, financial statements, medical records — anything you wouldn't email to a stranger. Browser-based processing means your file is read into memory by JavaScript that's already on your computer; it never travels to a server.
- Large files. No upload step means no 25 MB cap. Documents up to several hundred MB work fine on a typical laptop.
- Slow networks. If your upload speed is bad, browser-based tools just work — only the page itself needs to download.
- Security-aware environments. Some companies block file uploads to third-party services. Browser-based tools work because nothing leaves the network.
When iLovePDF wins
- Office format conversions (Word ↔ PDF, Excel ↔ PDF, PowerPoint ↔ PDF). These need server-side rendering with LibreOffice or similar — we can't do them in a browser yet.
- Long-document OCR. Tesseract WASM works in browsers but is slow on 100+ page scans. iLovePDF's server OCR is faster.
- Native mobile apps. If you want a tap-to-merge iPhone app, iLovePDF has one.
- Brand familiarity. If you need to send a "use this tool" link to a non-technical colleague, iLovePDF is recognized.
The fastest way to evaluate
Open your browser's DevTools and switch to the Network tab. Then run a merge or split operation on each tool. You'll see iLovePDF send a multi-MB upload request, then poll, then download. You'll see Converterzilla do exactly nothing on the network — because the work is happening in your tab, in your computer's memory, with JavaScript that has already finished downloading.
Try the privacy-first tools
If privacy matters for what you're working on, start here: