Best Open Source PDF viewer in 2026
Applications for viewing, annotating, editing, and managing PDF documents on desktop and mobile.
The most popular pick this year is EmbedPDF with 4,053 GitHub stars, but all 2 options below are worth considering depending on your needs.
2 open source pdf viewer — ranked by GitHub stars. Browse all
EmbedPDF
A PDF viewer that seamlessly integrates with any JavaScript project
Adobe Acrobat Reader
KillerPDF
Lightweight, portable PDF editor for Windows with no subscription or telemetry.
Adobe AcrobatHow we rank these tools
Tools are ranked by GitHub stars as a proxy for community adoption and trust. Stars reflect how many developers found a project valuable enough to bookmark — a reasonable signal for quality in the open source world. We only list tools that are actively maintained and open source.
Looking for tools you can run yourself? Browse self-hosted pdf viewer →