Merge PDF files

Merging copies every page out of each PDF you picked, in the order you set, and writes them into one new document. Nothing is re-encoded, so text stays selectable, links keep working and the pages come out at exactly the quality they went in at. The original files on your disk are untouched — you get a new file alongside them.

Order matters and it is easy to get wrong, which is why the list is drag-to-reorder with arrow buttons beside every row. The number down the left is the position that file will occupy in the finished PDF.

Assignment portals almost always take one file. If your submission is a cover page from Word, three scanned answer sheets and a reference printout, they have to become a single PDF before you can upload anything. The same goes for a lab file where each experiment was written up separately, or a semester's worth of unit-wise notes you would rather keep as one searchable document.

It is also the fix for photocopied question papers that arrived as one PDF per year — merge them into a single PYQ bank and you can search the whole decade at once.

Every other free PDF merger asks you to upload your documents to their servers, processes them there, and gives you a link back. Your marksheet, your ID scan and your assignment sit on somebody else's disk for as long as their retention policy says — and you have no way to check.

This page does the work in your own browser using the File API. There is no upload endpoint, no storage bucket and no account. Open your browser's network tab while you merge and you will see it: no request carries your file, because there is nowhere for it to go.

Password-protected PDFs cannot be merged — the tool will say so by name. Open the file in a reader, enter the password, re-save it without one, then come back. Very large batches are capped, because a browser tab holds the whole document in memory while it works; if you are over the limit, merge in two rounds and merge the two results.