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smasi PDF-Combiner

The smasi PDF-Combiner for MacOS and Windows is the practical and ideal addition if you have a scanner or a multifunction printer (MFP) without a duplex unit or if it is out of order...

Double-sided scanning without a duplex unit

As soon as you need to scan a double-sided document, you're annoyed that you didn't buy a scanner with a duplex unit. Or is the duplex unit just too slow? Or is it damaged?

Thanks to smasi PDF-Combiner, you now have an easy-to-use and low-cost solution for merging PDF files:

  • First, scan all the front pages as usual using the Automatic Document Feeder (ADF) and save them as the first PDF file.

  • Then repeat the scanning process with the backs and save as a second PDF file.

  • Now simply drag and drop these 2 files into the window of the smasi PDF-Combiner.

  • Finally, specify the desired destination file and execute the action.

And it's already done: The odd and even pages are correctly arranged for you in the destination file. Smart and simple!

Go to download

As usual, use the Automatic Document Feeder (ADF) to scan all the front sides and then all the back sides into a separate PDF file. With the smasi PDF-Combiner you will then be able to automatically sort all the pages into a single PDF document with just a few mouse clicks.

Download and try it


Merge PDF pages

After scanning your double-sided document, the front and back sides are put together correctly alternately, fully automatically.

Combine PDF files

​There is also another great feature available that allows you to easily join multiple PDF files into one document using drag and drop.

With just a few mouse clicks

You can do all the work with just a few mouse clicks.  The newly created PDF document or the destination folder can then be opened automatically for you.


You don't have to buy a new scanner to digitize double-sided documents. For just USD 1.00 you can get the practical solution here (no subscription). 

100% privacy

​The smasi PDF-Combiner is deliberately available as a native application so that sensitive content does not leave your local, secure environment.

Smart and simple

Even if you don't use the tool regularly, you will find your way around straight away, as the user interface is kept simple and designed precisely for this task.

Depending on your operating system, you can conveniently and securely install the latest version of PDF-Combiner directly from the Mac App Store or the Microsoft Store. Thanks to the trusted sources, there is no danger of viruses, because each application is further checked by Apple or Microsoft before it is published.

Get this handy tool from the corresponding app store today and try it out...

Get it from Microsoft Store
Download on the Mac App Store

No obligation, no risk

With the free demo version, you can try out the entire range of features without obligation. The only limitation of the demo version is that a maximum of 2 pages per PDF file can be processed. If necessary, the application can be easily uninstalled at any time, as it does not change any system libraries or settings. The user interface is available in English and German.

Scan pages from a hardcover book

In addition, the smasi PDF-Combiner is able to join any number of individual PDF files into a single PDF file.

When you scan the contents of a book, you get a separate PDF file for each page of the book because you can only digitize the bound book using the flatbed scanner, not the Automatic Document Feeder (ADF).

With the additional feature of smasi PDF-Combiner you can also easily join all these individual pages from any number of PDF files:

Simply drag and drop the desired PDF documents into the smasi PDF-Combiner window and quickly reorder them as needed. 

Go to download

If you like the application, you can purchase the unlimited full version including upcoming updates with a one-time in-app purchase for USD 1.00 (no subscription).

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