Can I merge password-protected PDFs?

You can unlock protected PDFs first using our Unlock PDF tool, then merge them seamlessly.

Is there a limit on how many PDFs I can merge?

No! ZontaroPDFtools allows unlimited PDF merges completely free without login.

Combine multiple PDF files into one ordered document in seconds. 100% free, fast, and secure client-side PDF merger.

or drop PDFs here

Files stay 100% private Unlimited file size

Follow these 3 simple steps to complete your PDF task in seconds

Select or drag & drop multiple PDF files into the ZontaroPDFtools drop zone.

Drag thumbnails to arrange pages in the exact order you want.

Click Merge PDF to instantly generate and download your combined document.

Yes! All PDF processing happens directly in your browser or on secure temporary memory with zero data stored.