# Sumatra PDF is a PDF, ePub, MOBI, CHM, XPS, DjVu, CBZ, CBR reader for Windows

SumatraPDF is a free PDF, EPUB, MOBI, CHM, XPS, DjVu, CBZ and CBR reader for Windows.
It's small and starts up fast.
Simplicity of user interface is important to us.

## Downloads:

- latest stable release
- pre-release builds (latest features, potentially less stable)

Found a bug? Have feature request? Submit via issue tracker.
Have feedback or question? Discuss in forums.
Want to make SumatraPDF work better in your language? Contribute a translation.

## Documentation for users

Keyboard shortcuts
Installer cmd-line arguments
Command-line arguments
Configuring as default PDF viewer on Windows 10
DDE Commands
Use Sumatra as a pre-viewer for LaTeX editors
Configure Sumatra for restricted use
Supported document formats
Uninstalling SumatraPDF
Customizing eBook UI
Customize external viewers
Setting Sumatra as default PDF reader
How to contribute translation
How to submit bug reports
Reporting printing bugs
Version history
Update check doesn't work?

## Information for developers

Join the project as a developer
How we store settings
Our build system
Stress testing
Using DrMemory
Using OpenCppCoverage
Accessibility and Text-to-Speech
Debugging Sumatra
Is there a virus in Sumatra sources?
Source code downloads
Release process
Submit crash report

## Misc

Why only Windows?

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