Fixing a PDF with pages in the wrong order

Out-of-order pages usually come from a scanner feeding oddly or a merge gone wrong. Both are quick to fix once you see the pages.

Reverse a backwards scan

If the whole document is back to front, reverse the order in one action.

Fix interleaved double-sided scans

Two-pass duplex scans can interleave wrongly; reorder or re-interleave to restore the sequence.

Drag to fix a few

For a handful of stray pages, a thumbnail view lets you drag each into place.