Drop a file anywhere on this page, or pick one from your machine. Rotate a hundred sideways pages in one action and save a corrected copy.
Rotating in batches: every page starts ticked. Untick the ones to leave alone, or use Landscape / Portrait to tick only pages of that shape, then rotate. The rail marks a page 90° when the file itself already carries a rotation, so you can see what a previous tool actually wrote.
Saving: the rotation is written into the page's own rotation setting, which is how PDFs record it — the content is never re-encoded, so nothing loses quality and the text stays selectable.
Where the file goes: nowhere. It is read from your own disk, drawn to the screen, and cleared when the tab closes.
Find: matches are located within a line. A phrase the PDF breaks across two lines may not be found — search a shorter run of words.
Scanned documents are pictures of pages, so they display and rotate but have no text to search or select.