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.

Open book with marginalia

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.