How to Quickly Combine Scanned Pages from Two-Sided Documents in PDF
Question details
The user wants to efficiently combine scanned pages from two-sided paper documents into a single PDF file without manually merging them one by one.

- Product
- Device & OS
- not provided
- Scenario
- Digitizing two-sided paper documents in a paperless workflow.
- Observed behavior
- Manually merging scanned pages from two-sided documents one page at a time is too slow and inefficient.
Ensure your scanner is connected and configured correctly on your computer. If you have already scanned the pages separately, keep them in a single folder for easy access.
Use a Duplex Scanner to Automate the Process
The most efficient method for two-sided documents is using a duplex scanner, which captures both sides simultaneously and saves them as a combined PDF.
A duplex scanner features an Automatic Document Feeder (ADF) designed specifically to scan the front and back of a page in a single pass. This eliminates the need to manually flip pages or merge separate files later.
Place your two-sided documents into the scanner's Automatic Document Feeder (ADF) tray.
Open your scanner's software on your computer and select the "Duplex" or "Two-Sided" scanning option from the settings menu.
Set the output format to "PDF" and ensure the option to combine all scanned pages into a single file is checked.
Click the "Scan" button and wait for the process to complete. The resulting PDF file will automatically contain both the front and back pages in correct sequential order.

Merge Separately Scanned Pages using PDF Software
If you do not have a duplex scanner and must scan odd and even pages separately, you can merge them using PDF editing software.
Request the Original Electronic Document
If you are scanning documents just to edit or archive them, obtaining the original digital file can save you the hassle of scanning and merging altogether.
Easily Combine and Edit Scanned PDFs with WPS Office
WPS Office provides robust PDF tools that allow you to merge separately scanned pages, reorder them with an intuitive drag-and-drop interface, and manage your digitized two-sided documents effortlessly.
- 1. Launch WPS Office: Open WPS Office and click on the "PDF" tab in the main interface.
- 2. Access the Merge tool: Select "Merge PDF" from the top toolbar or the PDF toolkit menu.
- 3. Add your scanned files: Click "Add Files" to import the separately scanned PDF documents you want to combine.
- 4. Rearrange pages if necessary: Adjust the order of the documents or click into page management to reorder specific pages.
- 5. Complete the merge: Click the "Merge" button to combine everything into a single, organized PDF file and save it to your desired location.

Frequently Asked Questions
What is a duplex scanner?
A duplex scanner is a hardware device equipped with specialized sensors capable of automatically scanning both the front and back sides of a sheet of paper at the same time. This significantly speeds up the digitization of two-sided documents compared to manual flatbed scanners.
Can I combine scanned image files like JPG or PNG into a single PDF?
Yes. Most PDF editors, including WPS Office, include a "Picture to PDF" feature. You can select multiple scanned images from your computer, import them into the software, and export them together as a single, combined PDF file.
How do I reorder pages if my scanned PDF is out of sequence?
You can easily reorder pages by opening your PDF in an editor like WPS Office. Navigate to the "Page" or "Page Management" tab, and simply drag and drop the page thumbnails to rearrange them into the correct order before saving the file.




