Merge PDF

Merging combines PDFs by copying their pages into one new document, in the order you set. Pages are moved as finished objects — text stays selectable, links on the page keep working, and images keep their original data. Nothing is re-encoded, so the merged file looks and behaves exactly like the originals side by side.

The whole operation runs in your browser. There is no upload endpoint on this page — the files are read into memory, combined by a PDF engine running in a background worker, and written back to a file your browser downloads. That is why the order list can show page counts before you commit: the tool already knows what each file contains without sending it anywhere.

The output is named merged.pdf and carries no watermark. If any source document contains form fields, the result card tells you that fields from more than one file may collide, because PDF forms identify fields by name and two documents can reuse the same name for different fields. Encrypted PDFs are refused up front rather than merged into a broken result.

Mechanically, nothing leaves the tab. The page reads your files into memory, a PDF engine assembles the merged document in a background worker, and the result is written to a download — at no point does a request carry your document anywhere, and the page cannot: its security policy blocks outbound connections entirely. You can watch the network panel while it runs; that is the point of building it this way. No account, no email, no watermark, no stored copy — there is no server-side copy to store.

Merge is a page-level tool: it combines whole pages and cannot touch the words on them, cannot compress the result, and cannot open encrypted inputs. Those boundaries are stated rather than papered over. For text inside pages, the Android app edits the original text objects; for encrypted files, it opens them with the password on your phone. If your merge is mostly about order — which chapter follows which — this page is the whole job.

A typical run looks like this: drop contract.pdf, scope.pdf and appendix.pdf onto the page; see 4, 2 and 16 pages on the list; drag appendix above scope because the sign-off order changed; press Merge and download merged.pdf twenty seconds later. No account was created, no email given, no file left the machine — the four files involved exist only on your disk, and three of them are still exactly where you dropped them from.