Put several PDFs together into one file, in whatever order you want. Contracts, scans, statements, none of them are sent anywhere.
Drop them on the box above or pick them from your files. Add as many as you like.
They are joined top to bottom. Use the arrows to move a file up or down, or remove one you added by mistake.
You get one new PDF. Every original file stays exactly as it was.
The files people merge are rarely trivial. It is a signed contract plus its appendix, a passport scan plus a bank statement, a set of invoices for an accountant. Those are exactly the documents you should think twice about handing to a website.
Merging copies pages without rasterising them, so page text normally remains selectable. Document-level forms, bookmarks, links and certificate-based signatures are not guaranteed to survive rewriting unchanged; inspect those separately.
Save merged.pdf and inspect its order and page sizes. Raster compression is a separate option that removes searchable text; include fewer pages only with the recipient's agreement.
No. The work happens inside this tab, on your own machine. Open your browser's network tab while you use the tool, there is no request carrying your file.
Practical limits depend on the tool, browser and available device memory. Large files can fail even when no explicit limit is shown. Keep an original and use a smaller job if this device cannot finish it.
No, and there is no daily limit either. There is nothing to sign up for.
As many as your device can hold in memory at once. There is no limit set by us.
Merge them all first, then use the split tool to keep the pages you want.
Merging copies the real pages of each file into one new document, in the order you set. It does not turn pages into pictures, so text stays selectable and searchable, and vector artwork stays sharp at any zoom. The merged file is roughly the sum of the files you put in.
Each file keeps its own page size, so a document that mixes A4 and US Letter pages will come out mixed. Bookmarks and form fields from the originals are not specially handled, so if a document depends on them, open the merged file and check them before you send it.
A PDF that needs a password to open cannot be merged. Remove its password first with the Protect PDF tool, using the password you already have, then add the unlocked copy to the list.
Very large merges are limited by the memory of your device, not by the site. If a browser struggles, merge in two stages: join a few files, save the result, then join that with the rest. The order is whatever the list shows, so use the arrows to move a file up or down and check the list before you press the button.