Merge PDF Files Online
Combine two or more PDF files into a single document. Drag files in, reorder them, and download the merged PDF — everything happens locally in your browser, so your documents stay private.
🔒 100% private — files never leave your browser
Drag & drop PDF files here
or click to browse — multiple files supported
Files remain in this page memory. Download your results before refreshing or leaving.
Example and output check
The automated file check merges a two-page PDF and a three-page PDF into five pages. PDF.js independently reads the text in order. The merged Blob can continue directly to compression on this page.
Before you use the result
Arrange files before merging. Encrypted or damaged PDFs are rejected. Merging copies pages; interactive document features and digital-signature validity should be reviewed on the output.
How to use the Merge PDF
- 1 Drag and drop your PDF files into the box, or click to browse.
- 2 Drag the files to set the order in which they should appear.
- 3 Click "Merge PDFs" and download your combined document.
Frequently asked questions
Can I compress without selecting the output again?
Yes. After merging, use Continue: compress this PDF. The merged file remains available if compression fails.
Does refreshing keep my files?
No. The session is only in page memory. Download the result before refreshing or leaving.