Merge PDF
Merge PDF files online for free — combine two or more PDFs into one document, drag them into the right order, and download in seconds. Runs 100% in your browser; nothing is uploaded.
100% private — your PDFs never leave your browser. Conversion happens on your device; nothing is uploaded.
Password-protected PDFs are not supported. Your files never leave your device.
How to merge PDF
- Drop two or more PDF files here, or click to choose them.
- Drag the files into the order you want them combined.
- Add more PDFs if you need to.
- Click “Merge & download” to save the combined PDF.
What you can use it for
- Combine contracts, invoices or forms into one file
- Put a cover page in front of a report
- Join scanned chapters or sections into one document
- Send one attachment instead of several
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See all free PDF tools →Frequently asked questions
How do I combine PDF files into one?
Drop all the PDFs in, drag them into order, and click “Merge & download”. The pages of each file are joined, in that order, into a single PDF.
Is there a limit on files or pages?
There's no fixed limit — it depends on your device's memory. Dozens of normal documents merge easily on a modern laptop or phone.
Does merging change the quality?
No. Pages are copied as they are, so text stays selectable and images keep their original quality.
Can I merge password-protected PDFs?
Encrypted PDFs need to be unlocked first. Use our Unlock PDF tool, then merge the unlocked copies.
Are my PDFs uploaded?
No. Merging happens entirely in your browser with pdf-lib, so your documents never leave your device.