Open Source PDF Readers for Windows

A free, open-source viewer for Windows, supports PDFs, eBooks, Comics, with a simple, fast, and portable design prioritized for ease of use.

Multi-platform document viewer supporting PDF, comics, EPUB, images, and Markdown with annotation tools, sidebar navigation, and text-to-speech features.

Handwritten notes and PDF annotation app with pen input, shape drawing, customizable toolbar, image insertion, audio recording, and multi-platform support.

Highly versatile PDF and XPS solution offering customizable rendering and viewing with features like digital signatures, redactions, and annotations.

Readest is a modern, feature-rich ebook reader designed for avid readers offering seamless cross-platform access, powerful tools, and an intuitive interface to elevate your reading experience.

Koodo Reader is an all-in-one e-book reader that can help you better manage and study your e-books. It's free and open-source.

The Quick Look feature from Mac OS X, which allows users to preview file contents quickly by pressing the Space key, is missed. Windows doesn't have this feature. While alternatives like WinQuickLook and Seer exist, the decision was made to create a new version because the...

Qiqqa is a free research and reference manager. Search for, read and annotate your PDFs. Then review your work, write up and create bibliographies instantly.

Sioyek is a PDF viewer with minimal interface optimized for reading research papers and technical books.

Lightning fast with a slick design, Kavita is a rocket-fueled self-hosted digital library which supports a vast array of file formats. Install to start reading and share your server with your friends. book reader, self hosted, manga, comics, free, manhwa, e readers, electronic...

Thorium Reader is a free, open source multi-language EPUB reader for Windows 10, MacOS and Linux. It's privacy aware and highly accessible for visually impaired and dyslexic people.

Open-source PDF viewer/editor using Qt framework with C++ library, multithreading, hardware rendering, encryption, text layout, and form tools.

A simple PDF Reader built using Electron and PDF.js.

Xpdf is a free PDF viewer and toolkit, including a text extractor, image converter, HTML converter, and more. Most of the tools are available as open source.

A comic book reader and converter for CBZ, CBR, CB7, EPUB and PDF files.

Dark Mode PDF reader.

Dual-screen PDF reader for presentations written in Python. Show a presentation in one window and additional information in a presenter window.

Blazing fast PDF and portable eReader built on muPDF. Including the ability to save "highlights" and notes like on Kindle.

Bookworm is a document reader that allows you to read more than 15 document formats including PDF, EPUB, and MOBI using a versatile, yet simple, and highly accessible interface.

Multi-monitor pdf presentation tool. This Qt-based presentation viewer shows a presentation and notes for the speaker in separate windows. The modular interface supports different forms of notes and interactive tools.

modern computer flatboat is a mobile pdf viewer written in Qt and using MuPDF's libfitz.

Notetaking and blackboard replacement application. Inspired by Xournal. Written in C++/Qt for Linux / Windows. It has the ability to annotate PDF files and has a few other options (e.g. markdown support).

SourcePDF is a completely free to use PDF editor.