A PDF with pages out of order, pages that are upside down, unnecessary blank pages
or sections you don’t need. These problems are common and frustrating. The good news is that you don’t have to accept the PDF as it is. Reordering, rotating and deleting pages is easier than it seems with the right tools.
You don’t need expensive software or advanced technical knowledge. From free online tools to features built into your operating system, there are options for every level. The key is knowing which tool to use for each situation and how to do it without damaging the rest of the document.
Reorganizing pages in Adobe Acrobat
Adobe Acrobat Reader DC (the free version) has basic functionality for organising pages. Open the PDF, go to Tools > Organise Pages, and you’ll see thumbnails of all the pages in the document.
From there, you can drag pages to reorder them. Select a page and drag it to its new position. The other pages will adjust automatically. You can select multiple pages by holding down Ctrl (or Cmd on Mac) and move them all together.
You can also rotate pages from this view. Select the page that is upside down or on its side, and use the rotation buttons to rotate it 90 degrees in any direction until it is the right way up.
To delete pages, select the ones you don’t want and press the delete button or the Delete key. The PDF updates by removing those pages. Once you’re happy with the changes, save the document.
The free version of Adobe Reader has some limitations. For more advanced features, you need Adobe Acrobat Pro (the paid version), but the basic operations of organising, rotating and deleting work in the latest free version.
Preview on Mac
Mac users can reorder PDFs directly in Preview without any additional software. Open the PDF, switch to thumbnail view (View > Thumbnails), and you’ll see all the pages in the sidebar.
Reordering is simple: drag thumbnails up or down in the list. The pages are reordered in real time. You can see exactly how the document looks as you reorder it.
To rotate pages, select the page and use the rotation buttons in the toolbar or the Tools > Rotate Left/Right menu. Rotation is instantaneous.
Deleting pages is also straightforward: select the thumbnail of the page you want to remove and press Delete. The page disappears from the document. Save and you’re done.
Preview makes these operations very intuitive and visual. It is one of the best features of the Mac system for managing PDFs.
Free online tools
Web services such as Smallpdf, iLovePDF, PDF24 Tools and Sejda offer page reordering directly in your browser. You upload your PDF, the service displays thumbnails of all the pages, you drag them to reorder, rotate the ones you need, delete the unnecessary ones, and download the modified PDF.
These tools are particularly useful if you don’t have Adobe or use a Mac, or if you need to perform the operation from a computer that isn’t your own. All you need is a browser and an internet connection.
The usual limitations apply: maximum file size in the free version, number of operations per hour or day, and processing that can take time with large documents. For occasional use, these limitations are rarely a problem.
Privacy is an important consideration. You are uploading your document to external servers. For confidential information, it is better to use local software.
Free desktop software
PDFtk, PDF Sam Basic and PDF24 Creator are free programmes that reorder pages locally without sending files over the internet. They require installation but, once set up, they work well with no limits.
PDFtk is particularly powerful from the command line. You can specify exactly which pages you want, in what order, and which ones to rotate, all via commands.
For technical users, it is an excellent tool. For non-technical users, its basic interface may seem intimidating.
PDF Sam has a more user-friendly graphical interface. You load the PDF, view the pages, reorder them visually, define operations, and the programme generates the new PDF with your changes.
Rotating pages correctly
Pages upside down or sideways are a common problem in scanned PDFs. Someone scanned the document with pages in the wrong orientation. Rotating them is the obvious solution.
Most tools allow you to rotate in 90-degree increments: 90 degrees clockwise, 90 degrees anticlockwise, a full 180 degrees. This is sufficient to correct any incorrect orientation.
When rotating, make sure to rotate all the pages that need it. It’s easy to rotate one page and forget that the following ones are also wrong. Check the whole document after rotating.
Extract specific pages
Sometimes you don’t want to delete pages but extract them into a separate document. You might need only pages 5–10 of a 50-page document. Extraction creates a new PDF containing only those pages whilst keeping the original intact.
Adobe Acrobat and most online tools offer this feature. You select the range of pages you want to extract, and the system creates a new PDF containing only those pages. This is useful for sharing specific sections of long documents.
This is different from deleting because the original remains unchanged. You have the full document and also a new PDF containing only the relevant section.
Splitting PDFs
Splitting involves taking a large PDF and creating several smaller PDFs. A 100-page document can be split into five 20-page documents. Useful for organising content or meeting file size limits.
Some services offer automatic splitting (a new document every X pages) or manual splitting (you define where to split). Manual splitting gives you more control.
After splitting, you may end up with many files. Name them clearly so you know what each one contains: “Chapter1”, “Chapter2”, etc., rather than “document1”, “document2”.
Inserting blank pages
Sometimes you need to add blank pages between sections. This visually separates chapters or creates space for handwritten notes after printing.
Adobe Acrobat and some online tools allow you to insert blank pages at specific positions. You define where the blank page goes, the size (A4, Letter, etc.), and it is inserted into the document.
This is cleaner than creating blank pages in Word and then merging them with the existing PDF.
Reordering whilst merging
When merging multiple PDFs, many tools allow you to reorder during the merging process. You not only define which documents to merge but also in what order and which pages from each.
This is efficient when you know that after merging you would need to reorder them anyway. Do it all in one step rather than merging first and reordering later.
Batch operations
If you need to apply the same operation to many PDFs (rotate all pages in 20 documents, remove the last page from 50 documents), batch operations save a huge amount of time.
Software such as Adobe Acrobat Pro, PDFtk and some advanced online tools support batch processing. You define the operation once, select all the files, and the programme automatically processes each one.
For most users this is overkill, but if your work involves processing many PDFs regularly, automation is worth its weight in gold.
Maintaining quality during operations
Reordering, rotating and deleting pages are operations that should not affect the quality of the content. You are not compressing or converting, just rearranging. The content of each page remains identical.
Use tools that do not unnecessarily recompress the document. Some online tools automatically compress the output ‘to optimise’. If you do not need compression, look for options that keep the file exactly as it is except for the reordering.
Undoing mistakes
If you reorder a PDF and then realise you’ve made a mistake, let’s hope you saved the original. Always keep a copy of the original PDF before making destructive changes such as deleting pages.
If you haven’t saved a copy, undoing the changes may be impossible. Some programmes keep a history of changes, but once you save and close, those changes are permanent. Better safe than sorry.
Page numbers and reordering
If your PDF has page numbers printed on each sheet and you reorder the document, those numbers are not updated automatically. A page labelled ‘page 5’ may end up as page 10 after reordering.
If this is a problem, you need to regenerate the PDF from the original document with the new page numbering. Or accept that the printed numbers do not match the actual position of the pages.
For documents where pagination is critical (legal documents, academic theses), reordering pages may not be a viable option without reviewing the entire document.
Combining reordering with other operations
You often need to do several things: reorder the pages, delete unnecessary pages, rotate those that are the wrong way round, and then perhaps compress the result because it has become too large.
Some online platforms allow you to chain operations: you reorder, then compress, all in the same workflow without downloading and re-uploading between steps. This saves time.
If you use desktop software, you perform each operation sequentially, saving between steps or, if the software allows it, combining operations before saving the final result.
Reordering, rotating and deleting pages in PDFs are fundamental operations that everyone will eventually need. Modern tools make this simple, even for non-technical users. Choose the method that suits your system, frequency of use and privacy needs. Always save a copy of the original before making any irreversible changes. With these basic operations, you can take any messy PDF and turn it into a clean, well-organised document that’s ready to use.