Merge PDF files
Combine several PDFs into one, in the order you choose: your files stay on your device, nothing is uploaded, and it is free with no account.
Drop PDFs here
From 2 to 10 PDFs, 20 MB each.
Starting UFO Web…
The work happens in this tab. Nothing is uploaded.
How it works
Choose two or more PDFs, or drop them on this page.
Put them in order with the arrows.
Download the merged PDF. Your original files are not changed.
Questions
Are my files uploaded anywhere?
No. The work happens inside this browser tab, so your files never leave your device and no server sees them. Closing the tab clears them from memory.
Which PDFs cannot be merged?
PDFs locked with a password, signed PDFs, fillable forms and PDFs with attached files or scripts are not merged, because a merged copy would break or lose those parts. Bookmarks and links between pages are left out of the merged PDF; web links stay.
What are the limits?
From 2 to 10 PDFs, each up to 20 MB and 60 MB in all, with up to 2,000 pages in the merged PDF.
The same file engine is in the UFO apps for Android and Windows.