How to merge PDF files
Add your PDFs
Choose the files or drag them onto the page. You can add more at any time.
Check and arrange the pages
See a preview of every page. Drag pages into order, even between files, click one to read it larger, and remove any you don't need.
Merge and download
Click Merge and your combined PDF downloads straight away, with the pages exactly as shown.
About this tool
Merging is handy when a form, a contract and its attachments arrive as separate files, or when you want to send one tidy document instead of five. Every page keeps its original size, orientation and quality, because the pages are copied exactly as they are rather than re-printed.
The whole job runs inside your browser. Your PDFs are opened on your own device, so nothing is uploaded, nothing is stored and there's no waiting for a server.
Questions
Is there a limit on how many PDFs I can merge?
There's no limit on the number of files. Each file can be up to 500 MB, and because merging happens on your device, the practical limit is your device's memory. Most computers and phones handle dozens of normal-sized files without trouble.
Will merging reduce the quality of my PDFs?
No. Pages are copied as they are, so text stays sharp and selectable, and images keep their original quality.
Can I change the order of the files and pages?
Yes. In "All pages" you can drag any page to a new place, including between files, or use the arrows under each page. In "Files" you can move whole files at once. The merged PDF follows exactly the order shown.
Can I leave out some pages?
Yes. Click the bin under a page to remove it. Removed pages stay visible, faded, so you can bring them back with Undo or "Keep this page".
Are my files uploaded anywhere?
No. The files are read and combined by your browser on your own device. They're never sent to us or anyone else.
Can I merge password-protected PDFs?
PDFs that need a password to open can't be merged. Remove the password in the app you normally use to open the file, then try again.