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SumatraPDF

SumatraPDF is a Windows reader for PDF, EPUB, MOBI, comic book, DjVu, XPS and CHM files, made by Krzysztof Kowalczyk and contributors. It is free and open source, licensed mainly under the GNU GPL version 3.

Licensing at a Glance

  • Open source
  • Freeware

  1. Sumatra PDF is described as completely free and open source, with no ads, bundled software or subscription.[1]

  2. Most SumatraPDF source code is licensed under GPL v3, with code in src/base and src/mui under a BSD licence.[2]

  3. Because of the MuPDF licence, section 13 of the AGPL v3 (network use) also applies to SumatraPDF.[3]

  4. Sumatra PDF is a Windows-only application for Windows 7, 8, 10 and 11, with 32-bit, 64-bit and ARM64 builds.[4]

Products

References

  1. Sumatra PDF - Free, Fast PDF Reader for Windows · sumatrapdfreader.org · retrieved 2026-09-27
  2. sumatrapdf/AUTHORS at master · sumatrapdfreader/sumatrapdf · github.com · retrieved 2026-09-27
  3. sumatrapdf/AUTHORS at master · sumatrapdfreader/sumatrapdf · github.com · retrieved 2026-09-27
  4. Sumatra PDF - Free, Fast PDF Reader for Windows · sumatrapdfreader.org · retrieved 2026-09-27
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