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Merge PDF Files

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

PDF

or drop files here · up to 50 PDFs

Runs in your browser. A copy of your file is stored privately for 30 daysBy choosing a file you agree to our Terms of use and Privacy policy.

Combine PDF files into one document, up to 50 at once

Merge PDF files into a single document right in your browser. A cover letter, a signed form and a scanned certificate go in as three files and come out as one, ready to attach or upload.

You can combine up to 50 files at once. Pages are copied over as they are, not converted, so text, images and page sizes look exactly like the originals.

  • Combine up to 50 PDF files in one go
  • Drag the rows up or down to set the file order
  • Pages copied as they are, with nothing recompressed
  • Mixed page sizes and orientations each keep their own size

One PDF, with every page exactly as it was

Up to 50 files

Combine a month of receipts or every chapter of a thesis in one go, instead of joining two files at a time.

Pages stay untouched

Nothing is recompressed. Small print on a scan and fine lines in a drawing look the same as before.

Mixed page sizes

A4, US Letter and landscape pages can sit in one file. Each page keeps its own size and direction.

Free to use

There is no account to create, and no watermark is stamped on the merged pages.

How to use Merge PDF

  1. 01

    Add your PDFs

    Drop two or more PDF files onto the page, or tap to pick them from your computer, phone or a cloud folder.

  2. 02

    Put them in order

    Drag the rows up or down until they match the order you want. The file at the top supplies the first pages.

  3. 03

    Merge and download

    Press merge and save merged.pdf. Rename it to something your reader will recognize before you send it.

When it helps to merge PDF files

Plenty of websites and offices want one file, not five. Merging saves you from attaching documents one by one and hoping they arrive in the right order.

  • Job applications: a portal with a single upload box needs your resume, cover letter and certificates in one PDF.
  • Bookkeeping: your accountant would rather get one file of March invoices than 23 separate emails.
  • Travel: flight tickets, the hotel booking and insurance papers open from one place on your phone at the airport.
  • University: scanned handwritten pages go behind a typed title page before you hand in an assignment.

Tips for a clean merged PDF

Start file names with numbers, like 01 cover.pdf and 02 resume.pdf. They then show up close to the right order, and you only need to drag a row or two.

Fix problems in the small files first. Remove blank scanner pages with Delete PDF Pages and turn sideways scans with Rotate PDF. Finding page 37 in a long document is harder than fixing a three page file.

The merged file is roughly the size of all parts added together. If it ends up too big for an email or a form, run it through Compress PDF afterwards.

What merging does and does not change

Merging only joins documents. It does not resize pages, swap fonts or lower image quality. A landscape spreadsheet page stays landscape, and a small till receipt stays receipt sized next to full A4 pages.

Your source files are not modified either. FileKiwi writes a brand new PDF and leaves the originals where they were.

Got photos instead of PDFs? Turn them into a PDF first with JPG to PDF, then add that file to the merge.

Merge PDF: frequently asked questions

How do I merge PDF files for free?

Drop your PDFs onto this page, drag the rows into the right order and press merge. You get one combined PDF to download, and nothing is added to your pages.

How many PDFs can I combine at once?

Up to 50 files in one go. If you have more, merge them in two batches, then merge the two results into the final document.

Will merging reduce the quality of my PDF?

No. Pages are copied into the new file as they are, without converting or recompressing images. Text you could select in the original stays selectable in the merged file.

Are my PDFs uploaded or stored?

A copy of each PDF you add is uploaded over HTTPS and kept in a private folder on our server for 30 days, then deleted automatically. The merging itself happens in your browser, and the merged file is not stored. Keep that in mind for payslips and contracts.

Can I merge PDF files on my iPhone or Android phone?

Yes. Open FileKiwi in Safari or Chrome, pick the PDFs from the Files app or your Downloads folder, arrange them and merge. The result lands wherever your browser saves downloads.

Can I change the page order inside one file?

The merge tool orders whole files, not single pages. To move pages around inside one document, split it into parts first, then merge the parts back in the order you want.

Related tools

Compress PDF

Make PDF files smaller while text stays sharp.

Delete PDF Pages

Remove pages you do not need from a PDF.

Split PDF

Extract pages or split a PDF into several files.

Unlock PDF

Remove a known password and print or copy limits.

Crop PDF

Trim white margins or cut pages to the part you need.

Rotate PDF

Turn pages the right way up and save the PDF.

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Reviewed by Anna Lewiński, FileKiwi editor. Last updated October 5, 2026.