OpenToola Guides
Reorder PDF Pages: Put a Scanned Bundle Back in the Right Order
Rearrange PDF pages with up and down controls, check what page reordering can break, and know when splitting or merging is the better tool.
A scanner feeds pages in the wrong order. A bundle has the signature page at the beginning and the cover at the end. A colleague sends a report with page 7 after page 12. Reordering fixes the sequence without reprinting, rescanning or losing quality.
The tool is deliberately simple: it moves existing pages up and down. It does not duplicate, delete or rotate them. That simplicity is useful, but it also means you need to know which tool to use for the job.
What reordering does
OpenToola renders a thumbnail for every page. Each thumbnail has an up and a down button. The page labels show the original page numbers, so you can track where a page came from as you move it.
When you export, the pages are copied into the new order. The content is not re-encoded, so text stays selectable and images keep their resolution. The original file is not modified.
The output is a new PDF, usually named reordered.pdf. Rename it before sending. A name like contract-pages-in-order.pdf is more useful than reordered.pdf.
When reordering is the right tool
Use it when all the pages are present but the sequence is wrong. A scan that came out backwards, a contract with the annexes before the main text, or a report assembled in the wrong order.
It is also useful after a merge. If you combined several PDFs and the order is not what you wanted, reorder the pages instead of starting the merge again.
Do not use it to remove a page. Use Remove Pages. Do not use it to extract a single page. Use Split PDF. Reordering only changes the sequence.
What it does not do
It does not duplicate a page. If a form needs three copies of the same page, merge the PDF with itself twice or use a PDF editor. Reordering cannot create a page that is not there.
It does not rotate a page. If page 4 is sideways, use Rotate PDF. Reordering will keep it sideways in its new position.
It does not delete a blank page. Use Remove Pages for that. It does not combine two PDFs. Use Merge PDF. It does not add a cover. Use a merge with a cover PDF.
What can break
Bookmarks, links to pages, form fields and annotations may not survive the rebuild. A table of contents that pointed to page 12 may now point to a different page. A digital signature can be invalidated by any change to the document.
If the PDF is signed and the signature must remain valid, do not reorder it. Ask the sender for a corrected version, or keep the original and reorder a copy for reading.
If the document has a printed table of contents with page numbers, the numbers may no longer match. Update the contents or remove it. A document that looks fine can have a broken bookmark that only appears when someone clicks it.
Reorder a scanned bundle
Scanned pages are images. Reordering copies the images into the new sequence without re-encoding. The result looks the same, just in a different order.
Use the thumbnails, not the printed page numbers. A scan may show “Page 3” on the sheet while it is the fifth image in the PDF. The thumbnail and the label in the tool show the PDF order.
For a large bundle, work in a copy and check the result before sending. It is easy to move a page one position too far. If the document has a page with a signature, verify that it is still in the right place.
Reorder after merging
A common workflow is to merge several PDFs and then fix the order. Merge first, then reorder the pages, rather than merging repeatedly and hoping the sequence is right.
If the PDFs are large, the thumbnail grid takes time to load. Be patient; closing the tab mid-render loses the work. If the browser struggles, merge fewer files at a time.
Check the result
Open the new PDF and compare the first, middle and last pages with what you intended. Check the page count: reordering should not change it. If a page is missing, you may have deleted it by mistake or the original PDF was incomplete.
Check the joins between sections. A contract should read cover, main text, annexes, signature. A report should read title, contents, chapters. A scanned receipt batch should be chronological or in the order the recipient expects.
If the document has a table of contents, check that it still matches. If not, update it or note the change.
On iPhone and Android
On iPhone, save the PDF to Files, open the Reorder Pages tool in Safari, and use the up/down buttons. The thumbnails may be small; rotate the phone or zoom in before moving pages.
On Android, the browser can read the PDF from Downloads or Drive. Use the buttons carefully; a tap on the wrong arrow moves a page one position, which is easy to miss in a long document.
Reorder versus split and merge
Reordering is the cleanest tool when all pages stay in the same document. Split and merge are better when you need to remove pages, combine documents or create several files.
If you need to move a page from one PDF to another, split it out and merge it into the destination. Reordering alone cannot move a page across files.
How to find the right order
Write the intended sequence before you start: cover, contract, annex 1, annex 2, signature. Then match each thumbnail to a section. If a page is hard to identify, open it in a reader and note a heading or a page number.
Do not rely on memory for a long document. A written list is slower at the start and faster at the end, because you do not have to keep re-checking the whole file.
Bookmarks and printed page numbers
A bookmark is a link to a page. When the page moves, the bookmark may still point to the old position or stop working. Check the table of contents after reordering. If it is important, update it in a PDF editor or remove it.
Printed page numbers are part of the page image or text; they do not change when the page moves. A page that says “12” can now be the third page of the PDF. If the document will be read in order, the printed numbers may look odd. For a contract, that is usually acceptable; for a report, it may confuse.
A contract example
A contract bundle arrives as scan_001.pdf. The pages are: signature, cover, terms, annex A, annex B. The intended order is cover, terms, annex A, annex B, signature.
Move the signature page down four positions. Move the cover to the top. Check that the terms page follows the cover. If the annexes are reversed, move annex B after annex A. Then check the signature page is last.
Do not reorder the original. Work on a copy, export, and compare the first and last pages. If the client needs a specific page order, ask them before you start; “signature last” is common, but not universal.
Reordering a long scan
A 200-page scan can take a while to render. If the pages are in reverse order, moving them one by one is slow. In that case, a PDF editor with a reverse command or a script may be faster. For a one-off, the up/down buttons work, but be patient.
If the scan is in random order, sort the physical pages first if you still have them. Rescanning in the right order is often faster than moving 200 thumbnails.
Common mistakes
- Moving a page one position too far and not noticing.
- Reordering the original file instead of a copy.
- Assuming the printed page number is the PDF page index.
- Forgetting that bookmarks may break.
- Reordering a signed PDF and invalidating the signature.
- Using reorder when the task is actually remove or split.
Before sending
Open the reordered file in a reader and scroll through it. Check the first page, the last page and the joins. If the document has a table of contents, check a link. If it is a contract, check the signature page.
Rename the file and keep the original. If the recipient asks for another order, you can start again from the original instead of undoing every move.
Privacy
The PDF is processed in the browser. OpenToola does not upload it and does not keep a copy. The reordered file is downloaded to your device.
That is useful for contracts and identity documents. Delete the downloaded copy after sending it if it contains sensitive information, and keep the original in a private folder until you are sure the new order is correct.
Tools mentioned
Frequently asked questions
Does reordering reduce PDF quality?
No. The pages are copied into a new order without re-encoding. Text and images keep their original quality.
Can I duplicate a page?
The Reorder Pages tool only changes the order of existing pages. To duplicate one, merge the same PDF with itself or use a PDF editor.
Are my files uploaded?
No. The PDF is processed in your browser. It is not sent to a server.