How do I merge multiple PDF files?

Select at least 2 PDF files, rearrange them if needed by dragging, then click "Merge PDFs". Download the single generated file.

How many files can I combine?

Up to 50 PDF files per merge. Each document is fully loaded in server memory to combine pages; a fixed cap keeps the service fast and reliable (memory, processing time) and reduces abuse on the free tool.

Merge PDF Online Free

Your files never leave our servers — they are deleted immediately after merging.

Up to 50 PDFs per merge: each file is fully loaded in memory to build the output — the limit keeps the tool fast and dependable for everyone.

Drag and drop your PDF files here

How it works

Select at least 2 PDF files via the drop zone or "Choose files" button.
Rearrange the order by dragging the thumbnails (drag & drop).
Merge: click "Merge PDFs".
Download the single document: source files are not retained.

Frequently asked questions

How many files can I merge?: Up to 50 PDF files per operation. Beyond that, server memory and processing time become unpredictable; the cap also helps prevent excessive use while still covering most real-world bundles (reports, appendices, packs).
How do I change the file order?: Drag the thumbnails to rearrange them. The number indicates the final merge order.
Does merging preserve bookmarks and metadata?: Merging copies all pages. Bookmarks are not merged, but pages remain intact.
Are my files stored?: No: all files are deleted immediately after merging.

Combine PDF files

How it works

Frequently asked questions