Discover why FreeConversion is the best free and private alternative to PDF24 for merging your PDFs.
Select multiple files to join them into one.
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🔒 100% Secure • Local Processing
Last updated : May 14, 2026
100% free merge, no daily limit
German company, GDPR-compliant
Windows desktop version if you prefer offline
Google ads everywhere in the web interface
Files uploaded to their servers even in 'fast' mode
Visual interface dates back several years
Multiple email signup popups
No ads, no email popups
Local merge — no upload even in 'fast' mode
Interface rebuilt in 2024
PDF24 (https://tools.pdf24.org) is a popular tool, but it has significant limitations. The main difference with FreeConversion is privacy: unlike PDF24 which sends your files to remote servers, FreeConversion processes everything locally in your browser using WebAssembly technology.
This means your sensitive documents (contracts, resumes, bank statements) never leave your computer. Additionally, FreeConversion is 100% free with no file limits, no registration, and no ads.
Absolutely! FreeConversion is perfect for professional documents. Since all processing happens locally in your browser, your confidential documents remain 100% private.
FreeConversion handles large files directly in your browser. The limit depends mainly on your device's memory, but files up to 100MB are processed without issues.
The free and private alternative to PDF24. No limits, no registration.
Compress my PDFs for free →