How do I merge multiple PDF files into one document online for free?

Upload two or more PDF files above. You can drag to reorder them before merging. Click Merge and the tool combines all pages into a single PDF file using pdf-lib, entirely in your browser. Download the merged PDF instantly.

Can I reorder the PDFs before merging them?

Yes. After uploading, the PDF files appear in a list that you can reorder by dragging and dropping. The final merged PDF will contain the pages in exactly the order you specify.

Is there a limit on how many PDF files I can merge at once?

There is no hard limit imposed by the tool — you can merge as many PDFs as you upload. The practical limit is your browser's available memory (RAM). Very large or numerous PDFs may slow down or fail on devices with limited RAM.

Does merging PDFs preserve hyperlinks, bookmarks, and form fields?

Basic page content, images, and embedded fonts are preserved. Complex interactive elements like bookmarks (outlines), form fields, and JavaScript actions may not be carried over, as the merge operation rebuilds the PDF document structure from scratch.

Is the online PDF merge tool free and private?

Yes — completely free, no account required. All PDF processing runs in your browser using pdf-lib; your files are never uploaded to a server.

PDF merge

Merge PDF

Combine multiple PDF files into a single document. Drag, reorder, and merge — all in your browser.

Your files are processed locally and never uploaded to our servers.

Drop PDFs here

or click to browse

How it works

1
Upload your file
Drop your file or click to browse. No size limit.
2
Convert instantly
Processed in your browser — nothing is uploaded to any server.
3
Download the result
Your converted file is ready in seconds.

Frequently Asked Questions

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