Open Source PDF Readers

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.

Evince (or GNOME Document Viewer) is a document viewer for multiple document formats: PDF, Postscript, djvu, tiff, dvi, XPS, SyncTex support with gedit, comics books (cbr,cbz,cb7 and cbt) and others. See Supported Document Formats for details.

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

Librera Reader is a highly customizable and feature-rich application for reading books in PDF, EPUB, MOBI, DjVu, FB2, TXT, RTF, AZW, AZW3, HTML, CBZ, CBR formats on Android devices.

An ebook reader application supporting PDF, DjVu, EPUB, FB2 and many more formats, running on Kindle, Kobo, PocketBook, Linux and Android devices.

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.

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.

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...

PDF Viewer (aka pdf.js) is a new revolutionary extension using web standard technologies that allows you to display within Mozilla Firefox almost all PDF files found on the web without a plugin.

EmbedPDF is a framework-agnostic, MIT-licensed PDF viewer that drops into any JavaScript project. Whether you build with React, Vue, Svelte, Preact, or vanilla JS, EmbedPDF delivers a smooth, modern reading experience and a clean developer API.

A totally free of cost and ads PDF documents reader.

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...

A document viewer for the GNOME desktop. You can view, search or annotate documents in many different formats.

Document Viewer is a highly customizable document viewer for Android, fork of the last GPL version of EBookDroid .

Simple Android PDF viewer based on pdf.js and content providers. The app doesn't require any permissions.

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

Read fluently and comfortably, with simple and clear interface.

Supported Document Types: PDF, EPUB, MOBI, CBZ, FB2, XPS, TXT, HTML, OFFICE(DOCX, XLSX, PPTX) and ZIP/GZIP

Features: Horizontal / Vertical Flip Continuous Scroll Lock Stray: Keep scroll straight Margin Crop Focus M.

PDF viewer and annotation tool for macOS supports scientific paper reading, note-taking, highlighting, bookmarks, multiple annotation types, and AppleScript.

Atril is a simple multi-page document viewer. It can display and print PostScript (PS), Encapsulated PostScript (EPS), DJVU, DVI, XPS and Portable Document Format (PDF) files. When supported by the document, it also allows searching for text, copying text to the clipboard...

Kiview gives the user the ability to quickly preview different file types without the need to launch the default application.

Zathura is a highly customizable and functional document viewer. It provides a minimalistic and space saving interface as well as an easy usage that mainly focuses on keyboard interaction.

Self-hosted app to organize and read PDFs and ePubs, offering multi-user support, metadata fetching, progress tracking, intuitive browsing, and a modern responsive UI.