PDF Merger
Combine several PDF files into a single document. Arrange them in the order you want, then download one merged PDF.
Drag and drop files here, or
PDF · up to 100 MB per file
Your PDF is opened and processed inside your browser. It is not uploaded to CentralMirror or any other server, and it is discarded when you leave the page. Privacy policy
How to use the PDF Merger
- 1Choose or drop two or more PDF files.
- 2Use the up and down arrows to put them in the right order. Remove any you don't need.
- 3Click "Merge PDFs" and download the combined file.
Supported formats and limits
- Input: PDF files, up to 20 at a time.
- Maximum file size: 100 MB per PDF. Very large files may be slow on phones.
- Password-protected or encrypted PDFs are not supported. You will see a clear message if you add one.
- Output: one PDF. Links and form fields from the originals may not be kept.
Frequently asked questions
Is there a limit on the number of pages?
There is no fixed page limit. The practical limit is your device's memory; most computers handle several hundred pages comfortably.
Will merging reduce quality?
No. Pages are copied as they are, without re-compressing images or text.
Are my files uploaded?
No. The merge runs in your browser, so the documents never leave your device.
Why was one of my files rejected?
It is either password-protected, damaged, or not actually a PDF. Remove the password in the program that created it, or re-export it, and try again.