Merge PDF files
Drop in the PDFs you want joined, drag them into the order you want, and download one document. Everything happens in this page, so the files never leave your machine.
How to merge PDF files
- 1Add your PDFsDrop in two or more files, or add them a few at a time. There is no page or file count limit beyond what your own machine can hold in memory.
- 2Put them in orderDrag the rows to rearrange. The merged document follows the order shown on screen, top to bottom.
- 3Merge and downloadYou get a single PDF with every page from every file, in sequence.
Questions
Are my files uploaded to a server?
No. The file is read by your browser and processed in the page. It never reaches a server, so there is no upload to wait for, no queue, and no copy of your document sitting somewhere with a retention policy.
How many PDFs can I merge at once?
There is no fixed limit. The practical ceiling is your available memory, since the whole set is held in the tab while it merges. Hundreds of pages is routine; a few thousand may be slow on a low-memory machine.
Does merging reduce quality?
No. Pages are copied across intact, so text stays selectable, vector graphics stay sharp and images are not recompressed. The merged file is roughly the sum of the originals.
What happens to bookmarks and form fields?
Page content, including text and images, is preserved. Document-level structure such as outlines, form fields and annotations is not carried into the merged file.