How to merge PDF files online
Combining separate PDFs (reports, invoices, study notes and so on) into one file makes them easier to store, print and share.
1. Private by design
Many online PDF tools upload your files to their servers, which can expose sensitive contracts or financial documents. This tool works 100% client-side: the files are processed by your own browser and are never uploaded.
2. Ordering your files
After adding the files, check the list and use the up/down arrows to move each document into the right position. Then click Merge PDF to download the combined file.
Frequently asked questions
Are my PDF files uploaded anywhere?
No. The merge happens 100% in your browser using the pdf-lib library. Your files never leave your device, which makes it safe for contracts, invoices and other confidential documents.
How do I change the order of the files?
Use the up and down arrows next to each file. The final PDF follows the order shown in the list from top to bottom.
Is there a file size or number limit?
There is no fixed limit. Very large files depend on your device memory, so for hundreds of megabytes a desktop computer works best.