The best open source alternative to Firefox PDF Viewer (PDF.js) is SumatraPDF. If that doesn't suit you, our users have ranked more than 50 alternatives to Firefox PDF Viewer (PDF.js) and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Firefox PDF Viewer (PDF.js) are Okular, Evince, MuPDF and EmbedPDF.
This free, open-source viewer for Windows supports multiple formats like PDF, eBooks (ePub, Mobi), CHM, and Comic Books (CBZ, CBR). Prioritizing simplicity and speed, it offers a lightweight, portable design with a minimalist interface, catering to users seeking fast and efficient document viewing.
Multi-platform document viewer supporting PDF, ePub, comics, images, and Markdown with annotation, digital signature verification, tabbed interface, sidebar navigation, text selection, text-to-speech, magnifier, search, dark mode, and plugin support.
Supports viewing and editing PDF annotations, displays multiple formats such as PDF, Postscript, DjVu, comic books, TIFF, DVI, XPS, remembers per-document zoom and position, features search, table-of-contents navigation, SyncTeX integration, and printing.
MuPDF offers a highly versatile PDF, XPS, and eBook interpreter, customizable as a renderer, viewer, or toolkit. Features include digital signatures, redactions, form filling, annotations, and page manipulation, ideal for mobile, eBooks, and embedded apps supporting Java, C++, and Python.
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.
Sioyek is a PDF viewer with minimal interface optimized for reading research papers and technical books.
Document Viewer is a highly customizable document viewer for Android, fork of the last GPL version of EBookDroid .
A document viewer for the GNOME desktop. You can view, search or annotate documents in many different formats.
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.
Simple Android PDF viewer based on pdf.js and content providers. The app doesn't require any permissions.
PdfDing is a browser based PDF manager, viewer and editor that you can host yourself. It offers a seamless user experience on multiple devices. It's designed be to be minimal, fast, and easy to set up using Docker.
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Fast rendering, fast scrolling and zooming. But above all else: hold right mouse button and scroll to zoom! :D