Rearrange PDF Pages

Scanners, merged attachments and exported slides often leave pages in the wrong order. This tool rebuilds the PDF in the order you choose — typed as a list like 3, 1, 2, 5-8, or with one click for common fixes such as reversing a file, putting odd pages before even ones or collating a double-sided scan. Pages are moved, not re-rendered, so text, links and quality stay exactly as they were, and the file never leaves your device.

How to use this tool

1. Choose the PDF.
2. Pick how to reorder: type an order, or choose reverse, odd/even, interleave, collate or move one page.
3. For a typed order, decide whether pages you did not list go at the end or are left out, and whether a page may repeat.
4. Download the reordered PDF and check the "New page order" line.

Formula

Order list → page tree. The typed list is expanded (5-8 → 5, 6, 7, 8; 8-5 → 8, 7, 6, 5; "5-" → 5 to the last page), checked against the page count, and written as the new list of pages in the PDF's page tree.

Collating a double-sided scan with k = ⌈n ÷ 2⌉ fronts gives 1, n, 2, n − 1, …, because the backs were scanned last-page-first when the stack was flipped. Plain interleaving gives 1, k + 1, 2, k + 2, …

Example

A 6-page scan where you fed the fronts (pages 1–3) and then the flipped stack of backs (pages 4–6, coming out as 6, 5, 4) is fixed with Collate a double-sided scan: the new order is 1, 6, 2, 5, 3, 4. Typing 3, 1, 2 for a 3-page file shows "3, 1, 2", and reversing a 10-page file shows "10-1"; typing 2 with "Leave them out" gives a 1-page PDF.