What is Sumatra PDF? Sumatra PDF is a slim, free, open-source PDF/DjVu/EPUB/XPS/CHM/CBR/CBZ/MOBI viewer for Windows. Why another PDF reader? Sumatra has a minimalistic design. Simplicity has a higher priority than a lot of features. Its small and starts up very fast. Its designed for portable use: its just one file with no external dependencies so you can easily run it from external USB drive. More info »
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