One view with every page of the working document as a thumbnail, and every structural change you would want to make to it. Nothing is applied to the file on disk until you save, and everything can be undone.
Rearrange a PDF by dragging thumbnails: reorder, rotate, duplicate, delete, insert blanks, merge another file in and extract a selection. In your browser, no upload.
Open the editorFree, no account, and the file stays on your machine.
Drag a thumbnail to move it, with a drop indicator showing where it will land. Select several first — click, shift-click for a run, ctrl-click to add one — and they move together. To front and To back handle the two cases that are tedious to drag.
Rotate left or right applies to everything selected, so a batch of sideways scans is four clicks rather than forty. The rotation is carried through to whatever you do next: split a rotated page out to its own file and it arrives rotated.
Tick the pages and use Delete, the Del key, or the ✕ on a single tile. This only edits the working list, so Undo brings them back, and the file you opened is never modified — a deletion is only real once you save a new file.
Opening a file replaces what is loaded. Merge file with… is the one that adds to it, appending another document's pages to the working list where you can then reorder them. If you open a file with unsaved changes pending, you are asked which you meant rather than losing anything.
Extract selection writes the ticked pages out as a new PDF, leaving the working document alone — the quick way to pull one appendix out of a report. Insert blank adds an empty page at A4, US Letter, either landscape, or matching the first page of the document.
Never. Every operation edits an ordered list of references to pages; the bytes you opened are untouched. You get a new file when you save.
Yes, sixty steps deep, across every view. A deletion or a reorder is always recoverable until you close the document.
No. Pages are copied object for object into the output, so text stays text and images keep their original encoding. Quality is identical.
Yes — merge repeatedly. Each one appends to the working document, and you can reorder across all of them afterwards.