Key takeaways
- AI PDF Chat gives you an instant bullet-point summary and lets you ask direct questions about a document's content.
- It's built for quick answers from a document you already have open, not a long back-and-forth conversation like a general chatbot.
- The AI model downloads once (a few tens of MB) and then runs locally — your document's text is never sent to a cloud AI service.
- Works best on PDFs with real, selectable text; scanned documents need [PDF OCR](/pdf-ocr) first.
What this tool is (and isn't)
AI PDF Chat does two things: it picks out the most representative sentences from the document for an instant summary, and it answers direct, specific questions by finding the most relevant part of the text and pulling out the answer.
To be upfront about it: this is a small, focused model built for speed and privacy, not a large conversational AI. It's at its best with direct factual questions ("What is the total amount due?", "Who is the other party in this contract?") rather than open-ended requests like "write me a 500-word analysis." For that kind of deep analysis, a cloud AI tool will do more — the trade-off is that your document stays on your device.
Using it
- Drop in a PDF with selectable text (not a scan — try PDF OCR first if it is).
- Press "Summarize this PDF" for an instant bullet-point overview — this part has no download and works immediately.
- Type a specific question and press Ask. The first question downloads a small AI model (shown as a percentage); after that, questions answer in a few seconds.
Frequently asked questions
Does this send my document to OpenAI, Google or any other AI company?
No. The question-answering model runs inside your browser using Transformers.js — there's no API call to an external AI service, and nothing about your document is sent anywhere.
Why does the first question take longer than the rest?
The AI model (around 65MB) downloads the first time you ask a question, then your browser caches it, so later questions in the same browser are much faster.