How do I merge PDF files for free?
Add two or more PDFs here, set the order, and click Merge PDF. It is free with no signup and no watermark, and because the merge runs in your browser, the free version is not a demo of a paid upload service; there is no upload at all.
Does it upload my PDFs to a server?
No. The merge happens locally in your browser, so your source PDFs stay on your device the entire time and are never uploaded.
Can I control the order of the merged PDF?
Yes. You can move each file up or down before exporting so the combined document follows the exact order you want.
Does this work with password-protected PDFs?
No. This browser-based version is designed for standard, unlocked PDF files. Remove the password first if a file is protected.
Does it work on mobile?
Yes. Because it runs in the browser, you can merge PDFs on a phone or tablet as well as on a desktop, with no app to install.
How do I combine several PDFs into one?
Add the files in the order you want them, then export. The pages are copied into a single PDF in your browser, with nothing uploaded.
Does merging reduce the quality?
No. The pages are copied across as they are, with their text layers intact. Nothing is re-encoded, which is why merging is safe in a way that compressing is not.
Will the merged file be smaller?
No. It is roughly the sum of the inputs. If size matters, compress afterwards, and understand that compressing rasterizes the text.
What if the PDFs have different page sizes?
Both sizes survive into the merged file. An A4 report joined to a Letter appendix will contain both, which reads as an error even when it is intentional.
How many PDF files can I combine at once?
There is no fixed file count. The practical ceiling is your device memory, because every page is copied in the browser; dozens of ordinary documents merge without trouble, and the file list shows the running page and size totals before you export.
Is there a difference between merging and combining PDFs?
No. Merge, combine, and join all describe the same operation: the pages of several PDFs copied into one document in a chosen order. This tool does exactly that, with no compression and no changes to the pages themselves.