Merge PDF
Select every PDF at once and they become a single file, one after another. Pages are copied across with their original content intact, so nothing is re-encoded on the way through.
Pages are copied with their original content streams — nothing is re-encoded, so quality is untouched and the result is roughly the combined size of the inputs.
Select them all together, or drop them in as a group. They are read on your device rather than uploaded.
By default they are merged in the order you selected them. Switch to file-name order if your documents are numbered and you want them sorted properly.
Every page of every document is copied into one file, in order.
One PDF. If you need to reorder or drop individual pages afterwards, open the result in the editor.
Merging lifts each page's existing content across to the new document rather than rasterising and recompressing it. Text stays selectable, vector art stays sharp, and image quality is whatever it was in the source.
Most merge tools give you a fixed file-level order and nothing more. Here the merged document is just a document: reorder, rotate, duplicate or drop individual pages before you export.
The documents are combined in the browser, which means the practical ceiling is your device's memory rather than an upload limit or a queue.
A calm, fast PDF workspace. Free to use, private by default.