PDF Summarizer
A one-page brief from a long document — the key sentences, extracted by a real algorithm running entirely in your browser. Your document is never sent to an AI server.
PDF Summarizer
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Summary
An Honest Summarizer That Never Sees Your Document
Most “AI PDF summarizers” upload your document to a cloud model — a non-starter for contracts, medical records, or anything under NDA. This tool takes a different, honest approach: extractive summarization. It scores every sentence in the document by the significance of the words it contains (a classic frequency-based ranking with position weighting), then returns the highest-scoring sentences in their original order. The summary is made of the document's own exact sentences — nothing is paraphrased, invented, or hallucinated, and nothing is uploaded.
That makes it ideal for a fast first pass over long reports, papers, and agreements: you see the document's most information-dense sentences with zero privacy trade-off. Everything runs on your device via open-source browser libraries — your files are never uploaded. You can verify it yourself.
Frequently Asked Questions
No, and deliberately so. Generative summarizers paraphrase (and can misstate) your document, and they require uploading it. This is extractive: it selects the document's own most representative sentences using a transparent scoring algorithm that runs in your browser. What you read is exactly what the document says.
Every word is scored by how frequently it appears across the document (ignoring common stop-words). Each sentence is scored by the significance of its words, normalized for length, with a small boost for opening sentences. The top sentences are shown in their original order, alongside the document's dominant key terms.
The document is probably a scan with no text layer. Run it through our free OCR tool first — also fully on-device — then summarize the result.
No. Text extraction (pdf.js) and sentence ranking both run in your browser. You can watch the network tab: no request ever carries your document.
An extractive summary points back to the document
This tool selects important sentences from available text. It does not replace professional review and may miss meaning stored in tables, diagrams or scanned pages.
Make the source searchable first
If text selection does not work in the PDF, run OCR before summarising. Poor OCR can introduce names, numbers or punctuation errors that affect which sentences are selected.
Verify every consequential detail
Check dates, monetary amounts, obligations, exceptions and definitions in the original pages. Extractive methods favour sentences that resemble the rest of the document; a short but decisive exception may receive less weight.
Use it to navigate, not decide
A summary is useful for triage, meeting preparation and locating relevant sections. It is not legal, medical or financial advice and should not be the only basis for a decision about a contract, diagnosis, payment or deadline.
Summary limitations reviewed 11 July 2026 · Review standards