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

Merge PDF online free. Combine multiple PDF files into one document. No sign up required, instant results in your browser.

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