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Merge PDF

Combine several PDFs into one file, in the order you choose.

or drop them here

Add two or more PDFs · reorder them before merging

Your files are processed in this browser tab and never uploaded.

How it works

How to merge PDF files

To merge PDF files, add them above, put them in the order you want, and press Merge. You get one PDF containing every page of every file, in that order.

Merging copies pages exactly as they are. Text stays selectable, images keep their original quality, and each page keeps its own size, so an A4 report and a US Letter form can sit in the same file.

  1. 01

    Add your PDFs

    Choose two or more files, or drag them onto the page. Each file shows its size and page count once it has been read.

  2. 02

    Set the order

    Files are combined from top to bottom. Drag a file to a new position, or use the up and down arrows next to it.

  3. 03

    Merge and download

    Press Merge. The combined file is named after your first file, for example report-merged.pdf.

Features

What it does well

  • No quality loss

    Pages are copied, not re-rendered or re-compressed, so the merged file looks identical to the originals.

  • Mixed page sizes

    Portrait, landscape, A4 and Letter pages can be combined. Each page keeps its own dimensions.

  • Large jobs

    Merging hundreds of pages works on a normal computer. Files are processed one at a time to keep memory use low.

  • Problems flagged early

    A damaged or password-protected file is marked in red as soon as you add it, before you press Merge.

Good to know

  • Bookmarks and the table of contents from the original files are not carried into the merged file.
  • Fillable form fields may stop working in the merged file; fill in and save (or flatten) forms before merging.
  • Password-protected PDFs need to be unlocked before they can be merged.

Privacy

Your PDFs are read and combined by code running in this browser tab. They are never sent to a server, and closing the tab clears them from memory.

Questions

Merge PDF FAQ

How many PDFs can I merge at once?
There is no fixed limit. The practical limit is your device’s memory: dozens of files or several hundred pages work fine on a typical laptop. On older phones, merge large sets in smaller batches.
Can I merge only some pages of a file?
Not in one step. First use Split PDF to extract the pages you want, then merge the extracted file with the others.
Will links inside the PDFs still work?
Links to websites keep working. Links that jump to another page inside the same original document may not, because the page they point to has moved.
Why is the merged file larger than I expected?
The merged file is roughly the sum of the originals. If it is too large to email, run it through Compress PDF afterwards.
Does the order of pages inside each file change?
No. Each file’s pages stay in their original order. Only the order of the files is up to you.
GuideHow to combine several PDF files into one

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