Merge PDF files (combine PDFs into one)
Add your PDFs, drag them into order, type the pages you want from each, and download one PDF. Everything runs in your browser, even offline.
Your PDFs stay on this device. Nothing is uploaded, and there is no limit on files or pages. Password-protected PDFs can't be merged yet.
Add at least one PDF.
Show your work
Merge to see which pages went where.
How it works
Add your PDFs and put them in order by dragging, with the Move buttons, or with Sort (by name, "Scan 2" comes before "Scan 10"). Under each file, type the pages you want (like 1-3, 7, 10-z) or leave it empty for all pages, then press Merge. It runs in your browser with no install or account, so it works on Windows without Acrobat, on Mac, Android, iPhone and Chromebook.
Turning photos into a PDF first? Use JPG to PDF, then merge. Merged file too big to email or upload? Use Compress PDF.
How we build the merged PDF
The "Show your work" panel above lists every step after a merge. This is what it covers.
- Pages are copied as they are. Text, fonts, images and drawings are not re-encoded, so quality does not change.
- Settings a page inherits from its file (resources, page size, crop box and rotation) are written onto each copied page. Pages look the same as in the original (ISO 32000-1:2008 §7.7.3.4).
- Fonts and images shared by pages of one file are copied once. Add the same file twice and they are copied twice.
- Each file gets a row: pages in the file, what you typed, the pages used, and where they land in the merged PDF. Example: a 12-page report.pdf with
1-3, 7, 10-zgives pages 1-3, 7, 10-12, which is 7 pages. - With the double-sided option on, a blank page goes after each file with an odd page count, never after the last file. It has the same size and rotation as the page before it, and gets its own row.
- Links inside a file stay if the page they point to is in the merge. Links to pages you left out are removed. The panel counts both.
- Form fields keep their names unless two files use the same one. Then the later one is renamed, for example Name to Name-2, and the panel lists every rename.
- "Add a bookmark for each file" makes one bookmark per file, named after the file and pointing at its first page.
- Not kept: original bookmarks, custom page numbers (like i, ii), accessibility tags, layer settings, attachments and document JavaScript. A note on each file tells you when it has any of these.
Questions
Are my files uploaded? Is it safe for confidential documents?
No. Your PDFs never leave your device. The merge runs in your browser, so there is no server copy to delete. To check, load this page, turn off Wi-Fi, and merge. It still works.
How do I take only some pages from each file?
Type them in the box under each file, like 2-4 or 1, 5, z. z or last is the last page. r2 is the second page from the end. 8- means page 8 to the end. odd and even pick every other page. 5-1 puts pages 5 to 1 in reverse order. Leave the box empty to use every page.
What happens to fillable forms?
Fields stay fillable. Two fields with the same name would share one value, so the one from the later file is renamed, for example Name becomes Name-2. Or choose "Flatten forms" to turn filled-in fields into fixed text. XFA forms keep only their standard PDF view.
Why is my merged PDF smaller (or bigger) than the files added up?
Pages are not recompressed, so quality stays the same. Fonts and images shared by pages of one file are stored once, and the file is saved in a compact form, so it can come out smaller. Adding the same file twice copies its fonts and images twice. To shrink the result, use Compress PDF.
Why can't I add a password-protected PDF?
Locked PDFs can't be merged here yet. Open the file in a PDF reader, choose Print, then Save as PDF (on Windows: Microsoft Print to PDF), and add the new copy. This works if the file allows printing.