Merge PDF files online
Combine as many PDFs as you like into a single document. Drag the files into the box below, put them in the order you want, and download the merged result.
Your files never leave your device. The merging happens entirely in your browser, so nothing is uploaded to a server, nothing is stored, and nothing is scanned. That also means there is no queue to wait in, because there is no server to queue for.
There is no file limit, no watermark, and no account required.
or drop them here — nothing is uploaded
How to merge pdf
Add your PDFs
Drop your files into the box, or click to browse. You can add more files at any point before merging.
Put them in order
Drag the files to reorder them. The merged PDF follows the order shown, top to bottom.
Merge and download
Press Merge PDF. The combined file downloads straight to your device — usually in under a second.
Frequently asked questions
Are my files uploaded anywhere?
No. Merging runs in your browser using JavaScript, so the files stay on your device. You can confirm this by opening your browser devtools Network tab while merging — you will see no upload requests.
Is there a limit on file size or number of files?
There is no limit we impose. The practical ceiling is your device memory, since everything is held in RAM while merging. Phones and tablets have far less headroom than laptops, so very large documents may need a desktop browser. We check before starting and tell you if a file is too large for your current device.
Does merging reduce quality?
No. Merging copies pages across without re-encoding them, so text stays selectable and images keep their original resolution. The merged file is roughly the sum of the input sizes.
Can I merge a password-protected PDF?
Not directly. A PDF with an open password has to be unlocked first, using a password you know. Once unlocked, it merges like any other file.
Can I reorder or remove pages instead of whole files?
Yes, but that is a different tool. Use Organize PDF to reorder, rotate, or delete individual pages within one document.
Related tools
- Split PDF
Pull out pages, or split a PDF into separate files.
- Compress PDF
Shrink a PDF so it fits an upload limit.
- Rotate PDF
Turn sideways pages the right way up.
- PDF to JPG
Save every page as a JPG or PNG image.
- Organize PDF
Reorder, rotate, and delete pages visually.
- JPG to PDF
Turn photos and scans into a single PDF.
Related guides
- Are online PDF tools safe? What actually happens to your fileWhat really happens when you upload a document to a free PDF site, how to tell whether a tool uploads at all, and how to check for yourself.
- How to combine several PDFs into one fileHow to merge PDFs in your browser, on Mac, and on Windows — plus how to control page order and what to do when the result is too large.
- How to reduce PDF file size without losing qualityWhy PDFs get large, which compression actually works for your file, and how to shrink one without turning the text to mush.