Drag & drop to reorder PDF pages, then download the organized document.
Reorder PDF pages by dragging thumbnails into the sequence you want, then download the reorganised document. Lossless — only the page order changes.
A PDF holds its pages as objects referenced by a page tree. Reordering rewrites that tree — the page content itself is not touched at all, which makes the operation completely lossless and freely repeatable.
This is the case people struggle with most. Scanning a ten-page double-sided document in two passes — all fronts, then flip the stack and scan all backs — produces pages in the order 1, 3, 5, 7, 9, 10, 8, 6, 4, 2. The backs come out reversed because you flipped the stack.
Reversing the second group and interleaving it with the first restores the correct order. It takes a minute in a thumbnail view and is nearly impossible to reason about from a file listing, which is exactly what this tool is for.
No. Only the page tree is rewritten. Content, quality and size are effectively unchanged.
Reordering is handled here and deletion in Delete PDF Pages. Both are lossless, so running them in sequence costs nothing.
Drag the back-side pages into reverse order and interleave them with the fronts. The thumbnail view makes this straightforward to verify as you go.
You can rearrange freely before applying, and the original file on your disk is never modified — the tool produces a new document, so you can always start again.
Pages are dragged individually. For large-scale restructuring it is often quicker to split the document and merge the parts back in the order you want.
No. Thumbnails are rendered with pdf.js and the document is rebuilt with pdf-lib, both in your browser.