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PDF Merger

Combine PDF documents in your chosen order, with original page sizes preserved.

Choose the PDFs, move the cover before the report, then merge. Open the downloaded document to confirm page order and completeness.

How to use

What does this PDF merger do?

Combine ordinary PDFs into a new document in your chosen order. It copies pages rather than turning them into images, and keeps each page's dimensions and rotation.

Step by step

  1. Choose at least two unlocked PDFs. Check that the documents are the versions you intend to share.
  2. Move files up or down before merging. Pages within a file keep their source order.
  3. Merge, download a copy, then reopen it to check the page count, order and mixed page sizes.

Choosing the settings

OptionWhat changes
Document orderPut a cover first and supporting documents last. This tool orders whole files; use PDF Splitter first if you need only selected pages.
Mixed page sizesA4 and Letter pages remain different sizes. Merging is not page resizing.
Interactive documentsFlatten forms before use. Bookmarks, attachments, signatures and original metadata are not preserved.

Example and expected result

A one-page cover, a four-page report and a two-page appendix produce a seven-page PDF in that order. Page 1 is the cover, pages 2–5 are the report and pages 6–7 are the appendix. This is a page-count example, not a promise of a smaller file.

If it is not working

  • No more than 20 files, 50 MB combined and 300 pages combined. If you exceed a limit, reduce the batch before retrying.
  • For a damaged, encrypted or interactive file, export an ordinary unlocked copy from the source application. Do not bypass a password you do not know.
  • If memory is exhausted, cancel and merge fewer documents. Processing stops after two minutes; keep the originals and verify the downloaded copy.

How does PDF merging work?

Add at least two PDFs, move documents up or down, then merge. Pages keep their original size and rotation. Download and check the result before sharing. Your original files stay unchanged, and files never upload to a server.

Which PDFs are supported?

Use ordinary, unlocked PDFs. Damaged files, password protection and interactive forms are not supported. Export a flattened copy of a form first. This tool does not preserve document bookmarks, attachments, signatures or original metadata. Links between pages may not work after merging.

What if processing is slow?

The limit is 20 files, 50 MB and 300 pages combined. Large or complex PDFs can still exceed your device memory. Cancel at any time and try fewer documents. Processing stops after two minutes. This tool does not scan PDFs for malicious content.

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