What does this Merge PDF tool do?
It combines two or more PDF files into a single document, in exactly the order you choose. Each page is carried over as-is — text, images, fonts and page sizes are copied without re-rendering or re-compressing anything, so the merged file looks identical to the originals. You can mix files with different page sizes and orientations freely; every page keeps its own dimensions.
How to merge PDF files
- Click the upload box (or drag files onto it) and pick two or more PDFs.
- Check the list: each file shows its page count and size once it has been read.
- Use the arrow buttons to put the files in the order you want them to appear.
- Click "Merge PDFs", then download the combined file.
How it works — merging inside your browser
Most online PDF mergers upload your documents to a server, process them there, and make you trust that they are deleted afterwards. This tool works differently: a small PDF library runs directly in your browser tab, opens each file locally, copies its page objects into a new document, and assembles the result on your own device. Your files never travel over the network, there is nothing to delete from anyone's server, and the merge works even if you go offline after the page has loaded.
Tips and limits
- Password-protected files can't be merged directly — remove the password first with the Unlock PDF tool.
- There is no fixed limit on the number of files or pages; very large merges are only limited by your device's memory.
- Interactive extras such as bookmarks and form fields may not survive merging; regular page content always does.
When would you merge PDFs?
Typical cases: sending a single attachment instead of five (invoices and receipts for your accountant), assembling scanned chapters into one book, packaging a CV with certificates for a job application, or attaching annexes to a signed contract. One combined file is easier to email, print and archive than a folder of fragments.