The PDF jobs a viewer will not do and a website wants your file for. Put several files into one, take one apart, pull some pages out, drag pages into a different order, turn a page the right way up, and number the pages. Photos and screenshots become pages too. It all happens in this tab; nothing is uploaded.
PDF, JPEG and PNG. Add as many as you like, in any order; every page of every file appears below.
No pages yet.
One file of every page in the order above, only the pages you ticked, or the pages split into several files.
It copies pages. Each page in the output is the page from the source, unchanged, in the order you set and turned the way you set. Text stays text and links inside a page keep working.
The output is a new file. It carries none of the source files' author, title, creation date or other metadata. If that history matters to you, keep the originals.
It does not shrink files. A merged file is about the size of its parts. Compressing the images inside a PDF is a different job and this does not do it.
Encrypted PDFs need their password removed first. A locked file cannot be read. Open it in a viewer, save an unlocked copy, and add that.
Nothing leaves this tab. Reading, drawing the thumbnails and writing the result all happen in browser memory. With a folder connected, the result is filed under Sovereign Suite/STAPLE.
No. The files are read in your browser, the thumbnails are drawn there, and the output is written there. Open the network tab in your browser's developer tools while you use it and watch nothing go out.
Almost always because the file is encrypted with a password, even an empty one that a viewer never asked you for. Open it in a viewer, save an unlocked copy, and add that. Very rarely a file is damaged in a way a viewer tolerates and a strict reader does not.
No. It copies pages as they are, so a merged file is about the size of its parts and a split file is about the size of the pages it holds. Making a PDF smaller means re-encoding the images inside it, which is a different job.
They are drawn upright, in the corner you chose as the reader sees it, whatever way the page is turned. The numbers count the pages of the output in the order shown, starting where you set.