Optimize PDF & DJVU Files For Kindle & Mobile Devices With K2pdfopt

When it comes to optimizing PDF files for handheld devices such as Amazon’s Kindle Reader or a smartphone, the task isn’t very easy. This is due to the various adjustments required to make the document easily readable on 6 inch screens.

K2pdfopt (Kindle 2 PDF Optimizer) is a free software that optimizes PDF or DJVU files for hand held devices such as the Kindle Reader or a smartphone. It has been particularly designed for text-based files, containing graphical figures and a white background. The conversion process is performed using the Command Line Interface. K2pdfopt can be conveniently used with two-column or multi-column PDF/DJVU files such as IEEE.

To convert a document, drag it over the K2pdfopt.exe file. This will launch the command line interface.


Once the command line interface is launched, Press Enter to create a separate document with default settings. Alternatively, you can customize settings from the given options. For example, you can enter a given command to auto straighten the document, break pages, manage color output, detect columns, etc.


The original PDF or DJVU document is  preserved and a separate file is created within the same folder as the original file. The new file will have _k2opt added to it’s name, but the file extension (e.g. PDF) will remain the same. The output file is fully optimized for viewing on Kindle, mobile readers and other 6-inch screens. To convert files in batch, drag and drop a folder containing entire PDF or DJVU files onto the K2pdfopt.exe file.


To check out posts regarding the new Amazon tablet, known as Kindle Fire click here. K2pdfopt works on the following operating systems:

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