AI Text Summarizer
Paste any long text — articles, papers, reports, documents — and get an instant condensed summary. Extractive summarization with key phrase detection, all running in your browser.
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Original Words
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Summary Words
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Compression Ratio
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Key Sentences
Summary
Key Phrases
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Smart Extraction
Uses TF-IDF scoring and sentence position analysis to find the most important sentences.
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100% Private
Your text never leaves your device. All processing happens in your browser.
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Compression Stats
See exactly how much your text was condensed with word count and ratio metrics.
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Key Phrases
Automatically identifies the most important phrases and topics in your text.
Frequently Asked Questions
How does the summarizer work?
It uses extractive summarization — selecting the most important sentences from your original text rather than generating new ones. Sentences are scored using TF-IDF keyword frequency, position weighting (first and last sentences rank higher), sentence length normalization, and title keyword boosting when a title is detected. The highest-scoring sentences are selected and presented in their original order.
Does it use AI or GPT?
No. This tool runs entirely in your browser using classical NLP algorithms — specifically TF-IDF (Term Frequency–Inverse Document Frequency) scoring and statistical sentence ranking. There are no API calls to OpenAI, Google, or any other service. Everything is computed locally in JavaScript.
What's the character limit?
There is no PRO character gate. The 10,000-character marker is a performance guide for typical browsers; longer text can still be processed locally, but it may take longer.
What types of text work best?
The summarizer works best with articles, academic papers, reports, essays, news stories, and other long-form content with clear sentences. It's less effective on poetry, code, bullet-point lists, or very short texts (under 3 sentences).
Is my text sent anywhere?
No. This tool has zero server-side processing. The entire summarization engine runs as JavaScript in your browser. Nothing you type is ever transmitted to any server.