Merge PDFs into one file
Put several PDFs in order and join them into one file. The merge happens on your own phone or computer, so nothing is uploaded, and the text on every page stays selectable.
Updated November 5, 2026 · 2 min read
Choose the PDFs to merge
Pick two or more. You can add more after, then put them in order.
Your files never leave your device. They're joined right here in your browser. Nothing is uploaded, and the merged PDF keeps its text selectable.
On this page
How to merge PDFs
- 1
Choose your files
Tap Choose PDFs and pick two or more, or drop them on the box from your desktop. You can add more at any point.
- 2
Put them in order
Drag a file by its grip, or use the up and down arrows. The number beside each name is its place in the merged file.
- 3
Merge and download
Tap Merge and download. The new PDF saves to your device under the first file's name, with -merged on the end.
Good to know
- Pages are copied, not redrawn. Nothing is compressed or re-rendered, so scans stay as sharp as they were and typed text stays searchable.
- The order is by file. To pull single pages out, merge first, then split the result. Pages that came in sideways can be rotated.
- Locked files can't be merged. If a PDF asks for a password, open it, save an unlocked copy, and add that copy instead.
- Fill forms before merging. Answers already typed into a form show on the page, but the boxes may stop being editable in the merged copy.
- Each file can be up to 100 MB. Everything runs in your browser's memory, which an ordinary phone has plenty of for everyday PDFs.
Other ways to combine PDFs
On a Mac, Preview can do it: open the first PDF, show the page thumbnails in the sidebar, drag the other files into the sidebar where they belong, then save. Paid Adobe Acrobat plans have a Combine Files tool. Windows has no built-in way, which is why browser tools like this one exist.
Merging a packet that needs signatures
If the merged file is going out for signatures, you may not need to merge it at all. In SignMaster you can put several PDFs in one envelope, place fields on any page of any file, and the signer gets one link for the whole packet. The free plan sends 3 envelopes a month.
Questions? Answers.
Is there a limit on how many PDFs I can merge?
Up to 30 files and 250 MB in all at a time, and each file can be up to 100 MB. Everything stays in your device's memory, so the limits keep a phone from running out. For more, merge in batches and then merge the results.
Are my files uploaded anywhere?
No. Your browser reads the files from your device, joins them and saves the result. No part of any file is sent to SignMaster or anyone else.
Will the merged PDF keep its links and bookmarks?
Links to websites on the pages keep working. Bookmarks, the outline some PDFs show in a reader's sidebar, aren't carried over, because each file had its own.
Can I merge PDFs on my phone?
Yes. It works in Safari on iPhone and iPad and in Chrome on Android. Pick the files from Files or your downloads, and use the arrows to set the order if dragging feels fiddly.