Feb 4, 2020 · Explore the open source alternatives to Adobe Acrobat for reading, creating, and editing PDF files.

SumatraPDF is one of those amazing open source programs that does everything a closed-source and/or commercial product does, but better in every way.

Aug 22, 2024 · Multi-platform, fast and packed with features, Okular allows you to read PDF documents, comics and EPub books, browse images, visualize Markdown documents, and much more.

Aug 5, 2025 · Here we review and compare some of the best Open Source PDF Editors available along with the top features and pros and cons of each one: Finding a free PDF editor is difficult, especially …

Nov 27, 2025 · SumatraPDF is a lightning-fast, minimalist, open-source PDF reader optimized for viewing documents, not editing. It is portable, low on system resources, and supports other formats …

Oct 4, 2024 · An informative overview of the best PDF reader/viewer applications that uses a free open source software license for Android, Linux, macOS and Windows.

May 4, 2025 · Browse free open source PDF software and projects below. Use the toggles on the left to filter open source PDF software by OS, license, language, programming language, and project status.

Unlock free PDF power! Discover the top 7 open-source readers for versatile, reliable document viewing without the cost.

If that doesn't suit you, our users have ranked more than 100 alternatives to Adobe Acrobat Reader and many of them is open source so hopefully you can find a suitable replacement.

From the reading of PDF documents, editing, converting to other features, an open source PDF reader can be your best companion to handle all your needs without having to pay a penny. 1. Sumatra …