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AI PDF Summarizer
Extract, rank, and summarize key insights from your PDF document 100% offline using client-side AI heuristics.
100% Secure & Offline
Select PDF document
Drag & drop or select a PDF file to summarize
Document Summary
document.pdf (0 KB)
Original Words: 0
Summary Words: 0
Compression Ratio: 0%
Summarization Setup
Determines the density and sentence limit of the generated insights.
Enhanced Positional Bias
Weigh introduction & conclusion sentences higher.
Reading PDF...
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Frequently Asked Questions
Quick direct-answer guides about using this utility tool locally and securely.
How does the AI PDF Summarizer work client-side?
We extract the text layer from your PDF using the pdf.js page text stream reader. The extracted text is then normalized and scored using a local Term Frequency-Inverse Document Frequency (TF-IDF) sentence ranking algorithm to compile key summary bullet points.
Does this tool upload my documents to external AI servers?
No, the summarization runs 100% locally in your browser memory (RAM) using client-side JavaScript. Your confidential files are never transmitted to any external AI service.
Are scanned PDF documents supported?
This summarizer reads native digital text layers. If your PDF is a scanned document with no text layer, you will need to perform OCR on it first to extract the text.
Can I choose the length of the summary (short, medium, long)?
yes ,Currently the tool generates a fixed set of key bullet points based on TF-IDF sentence ranking, giving you the most important points automatically without manual length settings.
How accurate is a TF-IDF based summary compared to AI models like GPT?
TF-IDF ranks sentences by how frequently and uniquely important terms appear in the document, extracting the most relevant existing sentences rather than generating new text — making it fast, accurate for factual documents, and free from AI hallucination risk.
Is there a limit to how many pages or how large a PDF I can summarize?
There is no hard upload limit since summarization happens locally in your browser using your device's memory, though very large PDFs (500+ pages) may take longer to process.
Why does my summary look empty or inaccurate for a scanned document?
The summarizer extracts text directly from the PDF native text layer using pdf.js. Scanned PDFs are essentially images with no text layer, so you will need to run OCR first to convert the scanned pages into readable text before summarizing.