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PDFlys

Fusionner PDF

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Drag & Drop Reorder

Rearrange files in any order before merging. Preview thumbnails so you know exactly what the final document will look like.

No File Limit

Merge as many PDFs as you need in one go. There is no cap on the number of files or total page count.

Preserves Formatting

Fonts, images, links, and bookmarks from each source PDF are retained in the merged output.

How to Merge PDF Files Online

  1. 1

    Open the PDFlys Merge tool and drop your PDF files into the upload area.

  2. 2

    Drag the file cards to rearrange the order of documents.

  3. 3

    Preview the combined result using the page thumbnails.

  4. 4

    Click Merge to combine all files into a single PDF.

  5. 5

    Download the merged PDF to your device.

FAQ

Is there a limit on how many PDFs I can merge?▾
No. You can merge as many PDF files as you need. The operation runs in your browser, so performance depends on your device's memory, but most users merge dozens of files without issues.
Will merging PDFs reduce quality?▾
No. PDFlys combines the original PDF data without re-encoding. Text, images, fonts, and vector graphics remain identical to the source files.
Can I reorder pages from different PDFs?▾
Yes. After uploading, you can drag files to rearrange the document order. If you need to reorder individual pages across files, merge first and then use the Organize tool.
Do my files get uploaded to a server?▾
No. The merge operation runs entirely in your browser using JavaScript. Your PDF files are never sent to any server.
Can I merge password-protected PDFs?▾
You will need to enter the password for each protected PDF when uploading. Once unlocked, they can be merged like any other file.