Merge PDF

Combine several PDFs into one file — right in your browser, nothing uploaded.

Drop PDF files here or click to browseSelect several · merged in your browser

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About Merge PDF

This joins several separate PDFs into one continuous document. It's the everyday fix for assembling a single file out of parts: combining chapters or sections into one report, stapling a cover letter to a CV, merging signed pages back with the original contract, or gathering scanned receipts and statements into one submission. Add the files, remove any you added by mistake, and download the combined PDF.

Because it runs on your device, confidential documents — contracts, financial statements, IDs — never get uploaded.

How it works

Each PDF you add is loaded with pdf-lib in your browser, and its pages are copied — as real vector pages, not pictures — into a new document, top to bottom, in the order listed. The result is saved as a fresh PDF and downloaded. Because pages are copied rather than rasterised, text stays selectable and searchable, and vector graphics stay sharp at any zoom. Nothing is re-compressed.

Assumptions and defaults

Files are merged in the order shown, which is the order you added them; you can remove any file before merging with the × button.
Only files recognised as PDFs are accepted; other file types are ignored on drop.
The merged file is named merged.pdf.
Original page sizes and orientations are kept as-is — merging an A4 and a Letter document produces a PDF with mixed page sizes rather than normalising them.

Limitations

No page-level reordering. You control the order of whole files, and can remove a file, but you can't drag to reorder or rearrange individual pages within this tool.
Encrypted or password-protected PDFs can't be read and will stop the merge with an error — remove the protection first.
Interactive extras may not carry over. Page content, text and most annotations are copied, but document-level features like bookmarks/outlines, and some form fields or embedded scripts, may be dropped in the merged file.
Everything is held in memory, so merging a very large number of big PDFs is bounded by your device's available RAM.

Privacy

Your PDFs are combined in the browser with pdf-lib. No file is uploaded, stored, or sent anywhere — the merge happens entirely on your device.

Frequently asked questions

Is this merge PDF tool free?

Yes — free, no sign-up, no watermark, and no limit on how many files you combine.

Are my PDFs uploaded to a server?

No. Everything runs in your browser with pdf-lib; your files never leave your device.

In what order are the PDFs combined?

Top to bottom in the order listed, which is the order you added them. You can remove a file before merging, but there's no drag-to-reorder.

Does merging reduce quality or make text unsearchable?

No. Pages are copied as real vector pages, not images, so text stays selectable and graphics stay sharp. Nothing is re-compressed.

Can I merge password-protected PDFs?

No. Encrypted PDFs can't be read and will stop the merge. Remove the password/encryption first, then merge.

Will bookmarks and form fields survive the merge?

Page content, text and most annotations are preserved, but document-level bookmarks/outlines and some form fields or scripts may not carry over.

What happens if the PDFs have different page sizes?

They're kept as-is. The merged file will contain mixed page sizes rather than resizing everything to match.

Is there a file size or count limit?

No fixed limit — it's bounded only by your device's memory, since all processing is local.

Written by Lakshay Kumar(TechLakshay)

A QA Automation Engineer by trade, Lakshay's real passion is untangling complex problems into simple, working solutions — which is exactly why FreeMyTask exists. On Instagram, he channels that same instinct into helping 26,000+ content creators with SEO education, motivation, and hands-on query solving.

Last updated: August 22, 2026