QBMFX Double-sided scan merge
Combine a stack of front-page scans and its matching back-page scans into one correctly ordered PDF. Choose the fronts PDF first and the backs PDF second, then select whether the back stack was scanned in reverse order. This is useful for manual duplex scanning at photocopy shops where an automatic duplex document feeder is unavailable.
Choose your files and review the settings.
Keep originals and inspect the result before printing. File changes clear previous downloads. Heavy image and OCR work can take longer on a phone.
Using Double-sided scan merge
- Choose the fronts PDF first and the backs PDF second.
- Select the back-stack order used by the scanner.
- Create the interleaved PDF and verify front/back pairs.
Behind the result
The output alternates a page from the front stack with its matching page from the back stack. Reversed-back mode reads the second stack from its final page towards its first.
Free tools for everyday work
Book centers, photocopy shops, freelancers and developers can use this workspace without a paid plan or account. Files are processed locally. Prepare website resources from offline setup before disconnecting; Urdu/OCR also needs the separate pack above.
The Windows app currently includes the original four tools. These new Book Center tools are available on the website; app and extension updates will be separate releases.
Answers and practical details
Back-stack direction
A scanner may return the back sides in the opposite order after you flip the paper stack. Use reverse when the first back-scan page belongs to the final front sheet.
Price and account requirements
This website tool is 100% free. No login, subscription or paid conversion tier is required. Your device supplies the processing memory.
Files and privacy
Input documents and generated results are handled locally. They are not sent to a QBMFX conversion API or stored in a customer database. Website hosting and advertising can still make separate network requests.
Offline preparation
Prepare the website resources from Help while connected, then test the required tool offline. OCR and Urdu text tools also need their optional language or font resources prepared first. Browser storage can be removed by the browser or by you.
Windows app and Edge extension
The existing installed app and extension contain the original four PDF tools. These new Book Center tools belong to the website release; they will need a separate installed-package update.