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sumatrapdfreader

sumatrapdfreader/sumatrapdf

A lightweight Windows reader for PDF, EPUB, MOBI, CBZ, CBR, FB2, CHM, XPS and DjVu files.

Open-source alternative to:Adobe Acrobat Reader

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Last commit
19 hours ago

What is it?

SumatraPDF is a document viewer for Windows that opens many formats in one application, including PDF, EPUB, MOBI, comic archives (CBZ and CBR), FB2, CHM, XPS and DjVu. It is aimed at people who need a fast, simple way to read documents without installing a heavier suite.

The project is written in C and C++ and released under the GPLv3 license, with some code under BSD. Its codebase and developer documentation are published for contributors who want to build it from source.

The homepage hosts a user manual and developer documentation, and the repository includes a build workflow for the Windows client.

Key features

  • 01Opens PDF, EPUB, MOBI, CBZ, CBR, FB2, CHM, XPS and DjVu files in one app.
  • 02Runs on Windows.
  • 03Source code is public and can be built by contributors.
  • 04Offers a user manual on the project website.

Use cases

  • Reading PDF papers and textbooks on a Windows PC.
  • Reading e-books in EPUB or MOBI format without a large suite.
  • Viewing comic archives (CBZ/CBR) or CHM help files.

Quick start

  1. 1

    Visit the project website to get the reader

Things to know

  • Windows only; the README describes it as a reader for Windows.
  • Licensed under GPLv3 (copyleft), with some code under BSD.

In collections

Windows apps and utilitiesPDF, OCR & document tools

Topics

#pdf#pdf-viewer#windows#ebook-reader#document-viewer#c-plus-plus#win32

FAQ

What is sumatrapdf?
A lightweight Windows reader for PDF, EPUB, MOBI, CBZ, CBR, FB2, CHM, XPS and DjVu files. SumatraPDF is a document viewer for Windows that opens many formats in one application, including PDF, EPUB, MOBI, comic archives (CBZ and CBR), FB2, CHM, XPS and DjVu. It is aimed at people who need a fast, simple way to read documents without installing a heavier suite.
Is sumatrapdf free to use? What license does it have?
sumatrapdf is open source under the GPL-3.0 license. Check the license terms before using it in commercial products.
Is sumatrapdf still maintained?
Actively maintained. The last commit to sumatrapdf was on Nov 6, 2026.
What can I use sumatrapdf for?
Reading PDF papers and textbooks on a Windows PC. Reading e-books in EPUB or MOBI format without a large suite. Viewing comic archives (CBZ/CBR) or CHM help files.
How do I install sumatrapdf?
Visit the project website to get the reader
Where can I get sumatrapdf?
The source code and installation instructions are on GitHub: https://github.com/sumatrapdfreader/sumatrapdf

Summary generated by AI from the project's README. GitHub stats refresh daily.

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