If you want the latest features, you can try pre-release builds. If you really need them, you can download them from here . You can download the sources.

Contribute to sumatrapdfreader/sumatrapdf development by creating an account on GitHub.

Dec 2, 2025 · Sumatra PDF is a PDF reader software created for Windows computers as a part of an open-source project. Because of that, you can download Sumatra PDF for free and …

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Oct 25, 2023 · Download Sumatra PDF - Sumatra PDF is a slim, free, open-source PDF viewer for Windows.

Sumatra PDF is a slim, free, open-source PDF viewer designed for portable use so you can efficiently run it from an external USB drive. It can be used to view documents in PDF, DjVu, …