SumatraPDF is a free PDF, EPUB, MOBI, CHM, XPS, DjVu, CBZ and CBR reader for Windows. It’s small, fast, customizable and full of features.

Using AI? You can ask them questions about SumatraPDF. Ask Grok, ChatGPT, Claude.

Starting in pre-release 3.7 you can use sumatrapdf-tool.exe <tool> <option> <files> commands to convert, extract, search PDF and other files. sumatrapdf-tool.exe is installed next to SumatraPDF.exe, so this only works after SumatraPDF has been installed.

Found a bug? Have feature request? Submit via issue tracker and vote for features you want to see next.

Have feedback or question? Discuss in a forum.

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