Reading, augmented
Chat with any book,
as if you'd read it twice.
Upload a PDF, DOCX, TXT or link. Marginalia indexes the full text and gives you a public, shareable assistant that answers questions using the book itself — no hallucinations, just passages.

How it works
01
Upload the book
Drop a PDF, DOCX, TXT, or paste a link. Multiple sources per assistant are supported — even for 130-page PDFs.
02
We index the text
The book is split into semantic chunks and embedded into a vector index. Large books can take a few minutes.
03
Share the assistant
You get a public page with a description and a chat. Optionally connect a Telegram bot so readers can chat in DMs.