What this is for
Three jobs that usually need three tools: putting pages in the right order, turning the sideways ones the right way up, and dropping the blank sheet the scanner added. Here they happen together, on one screen, with a picture of every page.
Why thumbnails matter more than they sound
Every other page tool on this site works on numbers, and numbers are fine when the document is yours. They are useless the moment someone sends you a forty-page scan.
"Move page 17 before page 4" requires you to already know what page 17 is. Opening the PDF in another window, scrolling, counting, and then coming back to type numbers is the actual work, and it is where mistakes come from. Seeing the pages removes that step entirely.
The details that make it usable
Thumbnails render at 36 DPI. An A4 page comes out about 300 pixels wide — enough to recognise a page at a glance, and roughly one twentieth of the pixels of a full-quality render. On a long document that is the difference between a few seconds and a few minutes.
Rotation is instant. The thumbnail turns immediately and the real rotation is written into the file when you save. Re-rendering a page through the engine on every click would make the tool feel broken for no benefit.
Deleted pages stay on screen, greyed out, with a restore button. Making them vanish would look tidier and make it impossible to see what you had just done.
Each tile shows both numbers — where the page sits now, and which page it originally was. When you have moved six pages around, that second number is what stops you losing track.
What it does not do
It rearranges pages. It does not edit what is on them, and it is not redaction: removing a page does nothing about sensitive text on the pages you keep. If that is what you need, use the redaction tool instead.