iLovePDF is one of the most popular online PDF tools, with a wide range of features and a large user base. Privatool takes a different approach: every tool runs entirely in your browser, meaning your files never leave your device. Here's a direct comparison.
Feature comparison
| Feature | Privatool | iLovePDF |
|---|---|---|
| PDF compression | ✅ Client-side | ✅ Server-side |
| PDF merge | ✅ Client-side | ✅ Server-side |
| PDF split | ✅ Client-side | ✅ Server-side |
| PDF to Word | ❌ Not available | ✅ Available |
| File size limit (free) | No server limit | 100MB |
| Requires account | ❌ Never | Optional (larger files) |
| Files uploaded to server | ❌ Never | ✅ Yes |
| Files retained after processing | ❌ N/A | Up to 2 hours |
| Ads on free tier | Yes | Yes |
Privacy: the key difference
iLovePDF uploads your PDF to their servers for processing. Their privacy policy states files are deleted after processing, but this requires trusting a third party. For documents containing personal data — contracts, medical records, financial documents — this is a meaningful risk.
Privatool processes everything in your browser using the PDF-lib JavaScript library. No file ever leaves your device. This is verifiable: you can disconnect from the internet after the page loads and the tool still works.
When to choose iLovePDF
- You need PDF-to-Word or OCR conversion (Privatool doesn't offer these)
- You're processing very large files on a low-powered device (server-side processing is faster for older hardware)
- You need advanced editing features like form filling or e-signatures
When to choose Privatool
- Your documents contain sensitive or confidential information
- You process PDFs frequently and don't want files stored on third-party servers
- You work offline or in environments with restricted internet access
- You want a faster tool for basic operations (no upload/download round-trip)
Bottom line
For basic PDF compression, merging, and splitting — especially with sensitive documents — Privatool's client-side approach is the more private choice. For advanced conversions and editing that require server-side AI, iLovePDF has more features.
The offline test
The article claims above that you can disconnect from the internet and the tools keep working. That is worth doing, because it is the clearest demonstration of the architectural difference:
- Load a Privatool PDF page and wait for it to finish loading.
- Turn off Wi-Fi, or open DevTools → Network → set throttling to Offline.
- Drop in a PDF and run merge, split, or rotate.
The operation completes normally. Repeat the same steps on any server-based tool and it fails at the upload step, because there is nothing local to run.
This is not a party trick — it is the practical consequence of where the code executes, and it explains why these tools also work on locked-down corporate networks that block file uploads to unapproved domains.
What 100 MB really limits
iLovePDF's free tier caps files at 100 MB. Most documents are far below this, so it rarely bites — with two exceptions.
Scanned documents are the common one. A 30-page contract scanned at 600 DPI in colour can easily exceed 100 MB, because each page is a full-resolution image rather than text. These are also, by their nature, the documents most likely to be signed, legal, or confidential — so the file most likely to hit the upload limit is also the file you would least want to upload.
Merged output is the other. Combining several reports with embedded images crosses the threshold quickly, and the limit applies to the result as well as the inputs.
Client-side processing has no such cap; it is bounded by your device's memory, which on a desktop is far more generous.
Speed: the round-trip nobody counts
For a 20 MB PDF on a typical connection, a server-based tool spends roughly 15–20 seconds uploading, a few seconds processing, and several more sending the result back. Client-side, the transfer time is zero — the file is already in memory. The processing itself may be marginally slower than a dedicated server, but it starts immediately.
The gap widens on slow or asymmetric connections, where upload bandwidth is typically a fraction of download. It narrows to nothing on a very small file.
Frequently asked questions
Is iLovePDF unsafe to use?
No. It is a well-established service with normal security practices and a clear deletion policy. The distinction is architectural: any server-based tool requires you to trust its handling of your file, while client-side processing removes the question. For routine documents that trust is entirely reasonable.
Why can't Privatool do PDF to Word?
It needs layout reconstruction — inferring paragraphs, tables, and reading order from positioned glyphs — which requires either a licensed engine or a large model. Neither fits in a browser tab, and running it server-side would break the no-upload guarantee. This is a deliberate limit, not a missing feature.
Do I need an account for either?
Never for Privatool. iLovePDF works without one for basic tasks but requires sign-in for larger files and some features.
Which handles a 300-page PDF better?
On a desktop, Privatool handles it fine and avoids a long upload. On an older phone, memory limits may make the server-side approach more reliable.
Are the merged results identical?
Yes. Merging and splitting are structural operations on the PDF file format, so a correctly implemented merge produces equivalent output wherever it runs. Compression is where implementations differ, since it involves quality trade-offs.