Merge PDF files

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

or drop them anywhere

How to merge PDF files

  1. Choose your PDFs

    Select two or more files at once, or drop them on this page.

  2. Put them in order

    The first opens; the rest wait in the Merge list, where you can reorder them.

  3. Merge and save

    Press Merge, then Save the combined PDF.

Merge PDF in your browser

Merging happens on your computer, so there is no upload to wait for and no limit on how many files you combine beyond your device's memory. Choose the PDFs together: the first opens, and the rest wait in the Merge list, where you can put them in order before pressing Merge.

The first file is kept exactly as it was and the others' pages are added after it, whatever their page sizes. Before saving you can still reorder, rotate or delete pages of the merged document, number its pages or compress it.

Why use OnePDF to merge PDF files

  • Any number of files

    Merge as many PDFs as you like, whatever their page sizes.

  • The first file untouched

    The first PDF is kept exactly as it was, and every other file's pages are added after it.

  • Edit the result

    Reorder, delete or rotate pages of the merged PDF before you save.

Questions about Merge PDF

Is there a limit on how many PDFs I can merge?

No fixed limit, only your device's memory. Merging happens on your computer, not a server.

Can I change the order?

Yes. Move files up and down in the Merge list before merging, and pages in the Pages panel afterwards.

Are my files uploaded?

Not unless you sign in. Signed out, your file is opened by OnePDF inside your browser, on your own device, and is not uploaded to any server. Signed in with a TensorActivity account, the files you open are also saved to your account, encrypted, so they are there on every device you sign in to.

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