Discover why FreeConversion is the best free and private alternative to FormatPDF 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 with no signup
Spanish company (Madrid)
20+ PDF tools included
Files uploaded every time
Basic interface
No advanced options (limited page order)
Speed depends on server load
Advanced options: customizable page order with preview
Constant speed (no server queue)
Quebec-based, under Canadian law
FormatPDF (https://www.formatpdf.com) is a popular tool, but it has significant limitations. The main difference with FreeConversion is privacy: unlike FormatPDF 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 FormatPDF. No limits, no registration.
Compress my PDFs for free →