SumatraPDF documentation

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.


Found a bug? Have feature request? Use issue tracker .

Have feedback or question? Discuss in forums .

Want to make SumatraPDF work better in your language? Contribute a translation .

Documentation for users

Command-line arguments

Supported document formats

DDE Commands

Use Sumatra as a pre-viewer for LaTeX editors

Configure Sumatra for restricted use

How to submit bug reports

Reporting printing bugs

How to contribute translation

Uninstalling SumatraPDF

Customizing eBook UI

Customize external viewers

Setting Sumatra as default PDF reader

Information for developers

Join the project as a developer

How we store settings

Our build system

Stress testing

Using DrMemory

Using OpenCppCoverage


Why only Windows?

Krzysztof Kowalczyk