Merge PDF Files
Combine multiple PDFs into a single file, in whatever order you choose. Add your files, arrange them, and download the merged PDF. Nothing is uploaded, it all happens on your device.
Click to choose PDF files, or drag and drop them here
Add two or more PDFs. Stays on your device, nothing is uploaded.
How it works
Merging happens entirely in your browser using a PDF library that runs client-side. Each page is copied directly from your source files into a new combined PDF, so there's no re-rendering or quality loss. Reorder files with the up and down buttons before merging, since pages are combined in the order the files are listed.
Are my PDF files uploaded anywhere?
No. Merging happens entirely inside your browser using JavaScript. Your files never leave your device or touch a server.
Can I choose the order the PDFs are merged in?
Yes. Add your files, then use the up and down buttons on each row to arrange them in the order you want before merging.
Is there a limit on file size or number of PDFs?
There's no hard limit built into the tool. The practical ceiling is your browser's available memory, very large or numerous files may take longer or struggle on low-memory devices.
Does merging reduce PDF quality?
No. Pages are copied as-is from each source file, there's no re-rendering, re-compression, or quality loss.
Can I merge a password-protected PDF?
Not currently. Password-protected or encrypted PDFs can't be read by the tool and will show an error, remove the password first with a PDF reader.