Merge PDF
Runs in your browserMerge PDF files in your browser. Nothing is uploaded, there are no limits on how many files you combine, and no signup is needed. Add your PDFs, drag them into the order you want, and download one file.
or drop them here, or paste
As many as you like. They stay on your device.
Merging joins two or more PDFs end to end. The pages of the first file come first, then the pages of the second, and so on. Nothing is re-encoded, so the text stays selectable, the images keep the quality they already had, and the file size of the result is roughly the sum of the parts.
Everything happens inside this page. Your file is read by JavaScript running on your own machine, and no part of it is sent anywhere.
Order is the thing people get wrong
Most merge mistakes are ordering mistakes. Files added from a folder arrive in whatever order the operating system hands them over, which is often not the order you expect. `Scan 10.pdf` frequently sorts before `Scan 2.pdf` because the sort is alphabetical, not numeric.
Drag the cards into position before you merge, or use sort by name if the file names already carry the order. The thumbnail on each card is the first page of that file, which is usually enough to tell chapters apart at a glance.
What happens to bookmarks, forms and links
Merging is a structural operation and some structure does not survive it cleanly. Bookmarks from the source files are not carried into the merged document. Internal links that pointed to a page inside their own file may point at the wrong page afterwards, because the page numbers have shifted.
Form fields are copied, but if two files contain fields with the same name the merged file will have a name collision, and filling one will fill the other. Rename the fields before merging if that matters, or flatten the forms first.
Digital signatures are invalidated by merging. That is not a limitation of this tool, it is what a signature is for. A signature certifies one exact byte sequence, and merging produces a different one.
Page ranges
You do not have to take whole files. Set a range on any file to take only part of it, using the same syntax you would use in a print dialog: `1-4` for the first four pages, `2,5,9` for three specific pages, `7-` for page seven to the end. Ranges are applied before the merge, so a file contributes only the pages you named.
Size limits
There is no daily limit and no account. The practical ceiling is your device's memory, because the whole document is assembled there. A modern laptop handles several hundred megabytes without complaint. A phone with a lot of tabs open will struggle sooner. If a very large merge fails, close other tabs and try again, or merge in two passes.
How to merge pdf
- 1
Add your files
Select or drop the PDFs you want to combine.
- 2
Put them in order
Drag the cards until the sequence is right.
- 3
Merge
Press Merge PDF and download the single combined file.
Questions about Merge PDF
How do I merge PDF files without uploading them?
Use a tool that runs in the browser rather than on a server. This page loads a PDF library into your own browser, assembles the merged file on your machine, and hands it back with a download. No copy of your document exists anywhere else.
Is there a limit on how many PDFs I can merge?
No. There is no daily task limit and no cap on the number of files. The only real limit is your device's available memory, since the merged document is assembled there.
Does merging reduce the quality of my PDF?
No. Pages are copied across as they are, so text stays selectable and images keep their original resolution. Merging does not re-encode anything.
Will my bookmarks survive the merge?
No. Bookmarks from the source files are not carried over, and internal links may point at the wrong page because page numbers shift. Text, images and form fields are preserved.
Can I merge a password-protected PDF?
Not directly. Remove the password first with the Unlock tool, which needs the document password, then merge the unlocked file.