Upload a PDF and an on-device algorithm scores every sentence by how central it is to the document, then keeps the highest-scoring ones in their original order. It's a real extractive-summary algorithm running fully offline — not a cloud AI model.

How to use AI Summarizer

  1. Add a PDF file.
  2. Choose a summary length.
  3. Tap Run and download the summary as Markdown.

FAQ

Is this powered by an LLM like GPT or Claude?

No — it's an on-device, frequency-based extractive algorithm (similar in spirit to TextRank) that picks out existing sentences from your document. It doesn't generate new sentences, and nothing is sent to any AI service.

What kind of documents work best?

Well-structured prose (articles, reports, essays) works best. Densely tabular or scanned PDFs won't summarize well — run OCR PDF first if it's a scan.