PDF merger
Combine ordered PDF files.
or drop them here
Drop two or more PDF files to merge
How it works
Step 1
Add your PDFs
Select two or more files, or drag them in together; nothing is read until the browser opens them locally.
Step 2
Arrange the order
Drag the file list into the sequence you want, because pages are appended in exactly that order.
Step 3
Merge and download
The combined document is written in the browser with pdf-lib, so the result arrives as one ordinary PDF file.
Frequently asked questions
Can I merge PDFs in a specific order?
Yes. The order of the file list becomes the page order, and you can reorder the entries before starting the merge.
How many PDFs can I merge at once?
There is no hard limit, but memory matters: every document is held in the tab, so a handful of very large PDFs is safer than dozens.
Are my documents uploaded when merging?
Never — merging happens locally with pdf-lib, so confidential files stay in your browser rather than on a third-party server.
Files are processed on your device and never uploaded for conversion.