PDF Toolbox vs PDF24 — Which Free PDF Tool Should You Use?
A detailed comparison of features, privacy, and data handling. Updated May 2026.
| Feature | PDF Toolbox | PDF24 |
|---|---|---|
| Compress PDF | ✅ | ✅ |
| Merge PDF | ✅ | ✅ |
| Split PDF | ✅ | ✅ |
| PDF to JPG | ✅ | ✅ |
| JPG to PDF | ✅ | ✅ |
| PDF to Word | Coming soon | ✅ |
| Unlock PDF | ✅ | ✅ |
| Files uploaded to server | ❌ Never | ✅ Yes (German servers) |
| Free daily limit | Unlimited | Unlimited |
| Registration required | ❌ No | ❌ No |
| File size limit (free) | No hard limit | Varies by tool |
| Privacy-first | ✅ 100% local | ❌ Server processing |
| Open source libraries | Yes (pdf-lib.js) | Proprietary |
| Desktop app available | PWA (installable) | ✅ PDF24 Creator |
Why Choose PDF Toolbox Over PDF24?
The most important difference is where your files are processed. PDF24's online tools upload your documents to their servers in Germany for processing. While they comply with GDPR and delete files after processing, your sensitive documents — contracts, tax returns, medical records — still pass through a third-party server. PDF Toolbox processes everything locally in your browser using WebAssembly. Your files never leave your computer.
The second advantage is consistency. PDF24's free online tools have varying file size limits depending on the specific tool you use, and some advanced features are gated. PDF Toolbox applies no hard limits — if your browser can handle the file, so can we.
PDF24 does offer a desktop application (PDF24 Creator for Windows) that processes files locally — which is a good privacy-respecting option if you're on Windows. But for browser-based PDF work, PDF Toolbox gives you the same local-processing privacy on every platform: Windows, Mac, Linux, and mobile.
Privacy: Local Processing vs Server Uploads
PDF24 is developed by geek Software GmbH, a reputable German company. Their privacy policy states that uploaded files are automatically deleted after processing and that they comply with strict EU data protection regulations (GDPR). For non-sensitive PDFs, PDF24's server-based approach is generally acceptable.
However, any file uploaded to a server introduces risk — even with GDPR compliance. Server breaches, misconfigurations, and insider threats are real concerns. PDF Toolbox eliminates this risk entirely by processing files client-side using pdf-lib.js, an open-source JavaScript library. Your data stays on your device, period.
For users handling confidential, legal, or business-critical documents, local processing isn't just a nice-to-have — it's essential. PDF Toolbox gives you peace of mind that no copy of your document ever exists on anyone else's server.
When PDF24 Might Be Better
- You use Windows and want a full-featured desktop application (PDF24 Creator)
- You need advanced tools like PDF overlay, watermarking, or fax integration
- You prefer a German-made tool with explicit GDPR compliance documentation
- You need PDF-to-Word conversion (PDF Toolbox is working on this)
- You want a virtual PDF printer driver (PDF24 Creator feature)
Frequently Asked Questions
Is PDF24 really free?
Yes, PDF24 is genuinely free with no daily limits and no registration required. It's developed by a German company (geek Software GmbH) and funded through advertising on their website. However, the free online tools upload your files to their servers in Germany for processing.
Does PDF24 upload my PDF files to their servers?
Yes. Unlike PDF Toolbox, PDF24's online tools process files on their servers located in Germany. Your documents are uploaded, processed, and then the results are sent back to you. PDF Toolbox processes everything locally in your browser — your files never leave your computer.
Is PDF24 safe for confidential documents?
PDF24 states that uploaded files are deleted from their servers shortly after processing and that they comply with German data protection laws (GDPR). However, your sensitive documents still pass through a third-party server. If you're working with contracts, legal documents, tax forms, or any confidential files, PDF Toolbox is the safer choice since files are processed entirely on your device.
Does PDF24 have a desktop application?
Yes — PDF24 Creator is a free Windows desktop application that processes files locally, similar to PDF Toolbox. However, it's only available for Windows, and many users rely on the web-based tools for convenience. PDF Toolbox works in any modern browser on any operating system.
Why choose PDF Toolbox over PDF24?
The primary reason is privacy. PDF Toolbox processes files client-side in your browser using WebAssembly and pdf-lib.js — no uploads, no servers, no third parties involved. Additionally, PDF Toolbox has no file size limits, no ads, and works identically on Windows, Mac, Linux, and mobile devices through your browser.
Ready to try PDF Toolbox?
No registration. No uploads. No server processing. 100% free.
Start Using PDF Toolbox →