Your lecture, summarized.

ThatSum is a browser extension that turns lectures into PDF summaries. Add PDFs or PowerPoint slides to give the summary more context.

How it works

1. Open a lecture page and choose Summarize this page in the extension. Attach course material if you have it.
2. Review the estimated price before deciding whether to pay and continue.
3. When your summary is ready, download it from the extension's Library.

Already have the extension? Open it on the lecture page to get started.

Your files

Finished summaries are saved in your browser's Library, not in a permanent server archive. Source files are processed temporarily by ThatSum's backend and AI service. See the privacy policy for details about the service providers involved.

A study aid, not a substitute

AI can miss details or make mistakes. Check important information against the original lecture, and only submit material you have permission to use.

Questions?

Write to [email protected]. For payment issues, see our refund policy.