Open Paper

Open Paper is built for researchers, students, and anyone who reads academic papers regularly and wants more than a basic PDF viewer. It pairs annotation tools with AI assistance so you can mark up papers and actually understand what you're reading, not just highlight and move on.

The core focus is speed and depth together. You can annotate directly on papers while getting AI help to clarify dense passages, summarize sections, or connect ideas across your reading. It's designed to cut the time between opening a paper and genuinely grasping its content.

For those building a personal research workflow, Open Paper fits alongside tools like an open-notebook setup where you capture and connect ideas over time. If you've used tools like SciSpace for AI-assisted paper reading, Open Paper offers a self-hostable alternative you control.

The interface keeps distractions low. A collapsible sidebar lets you focus on the paper itself, pulling up navigation or notes only when needed. That kind of minimal friction matters when you're working through a dense methods section or trying to follow a complex argument.

It's a good fit if you find yourself re-reading the same paragraphs repeatedly, losing track of annotations across papers, or wanting AI explanations without sending your research to a closed commercial platform. The emphasis is on genuine comprehension rather than surface-level summarization.