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PDF Merger

Combine multiple PDFs into one single file in the order you choose.

How to use PDF Merger

  1. Drop the first PDF into the upload area. Repeat until every file you want to combine is listed.
  2. Use the up/down arrows next to each file to change the page order the merged PDF will follow.
  3. Click Merge PDFs and, once the summary appears, download the combined file.

About PDF Merger

The PDF Merger copies every page from each source document, one file at a time, and glues them together in the order shown on screen. Internal links, annotations and bookmarks are preserved where the source format keeps them. Every merge runs locally in the browser.

There is no hardcoded limit on the number of files, but extremely large jobs will be limited by how much memory your device can give to the tab.

Features

  • Merge 2, 10 or more PDFs in a chosen order
  • Reorder files with simple up/down controls
  • Shows total pages and output file name after merge
  • Everything happens on your device, no network round-trip

Frequently asked questions

Can I mix PDFs with different page sizes?

Yes. Each page keeps its original size in the merged file. The tool does not scale or rotate pages.

Why does a signed PDF stop being valid after merging?

Cryptographic digital signatures are intentionally bound to the exact byte content of the original PDF. Changing the file — including merging it — breaks the signature, which is the correct and expected behaviour.

Can I merge forms or fillable PDFs?

Basic field data usually survives, but interactive JavaScript and reader-specific form features are not preserved 100%. Always double-check the output before sending an important form.

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