SumatraPDF is a PDF, CHM, XPS, DjVu, CBZ and CBR reader for Windows.

SumatraPDF is small, starts up fast and simplicity of UI has a high priority.

Main website with downloads etc. is at http://blog.kowalczyk.info/software/sumatrapdf.

You can get the freshest version (and help us test!) by running pre-release builds.

Found a bug? Submit a bug report.

Are you a developer? Join the project.

Have feedback or questions? Discuss SumatraPDF in our forums.

You can make SumatraPDF work better in your language by improving translations of the program or of the web pages.

End user docs:

• command-line arguments that Sumatra understands
• DDE commands that Sumatra understands
• how to configure Sumatra for restricted use
• how to uninstall Sumatra
• configure Sumatra for writing LaTex, with TeXniCenter synchronization (external site)

Technical docs:

• How to join the project as a developer
• How to contribute program translation or web page translations
• how we store settings in Sumatra

Design and philosophical docs:

• thoughts on toolbar design
• why we don't provide official 64bit builds
• why Sumatra has no tabs