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AI Text Summarizer

Summarize long articles, essays, and documents into concise key sentences. Extractive summarization powered by TF scoring -- runs in your browser.

0 words / 0 sentences

What is AI Text Summarizer?

A text summarizer condenses long content into shorter versions while preserving the key information. This tool uses extractive summarization -- it analyzes each sentence using term frequency (TF) scoring, position weighting, and length analysis, then selects the most important sentences while maintaining their original order. Unlike AI-generated summaries, extractive summaries use your exact words, ensuring accuracy.

How to Use AI Text Summarizer

  1. 1

    Paste your text

    Copy and paste your article, essay, blog post, or document into the input field. The tool works best with at least 3-5 paragraphs of content.

  2. 2

    Choose summary length

    Select how long you want the summary: Short (3 sentences), Medium (5), Long (7), or percentage-based (25% or 50% of the original).

  3. 3

    Click Summarize

    Press the Summarize button or use Ctrl+Enter. The tool scores every sentence and extracts the top-ranked ones in their original order.

  4. 4

    Review the result

    Read the summary and check the stats -- original word count, summary word count, and reduction percentage. Copy the summary with one click.

Features

  • Extractive summarization -- uses your exact sentences, no rephrasing
  • TF (term frequency) scoring identifies the most informative sentences
  • Position weighting gives bonus to opening and closing sentences
  • Five summary length options: 3, 5, 7 sentences, 25%, or 50%
  • Preserves original sentence order for natural reading flow
  • Word count comparison and reduction percentage stats
  • One-click copy for the generated summary
  • 100% browser-based -- your text is never uploaded to any server

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Frequently Asked Questions

What is extractive summarization?+
Extractive summarization selects the most important sentences from the original text and presents them as the summary. Unlike abstractive summarization (used by ChatGPT-style tools), it does not rephrase or generate new text -- it pulls exact sentences from your document.
How does the scoring algorithm work?+
Each sentence is scored based on three factors: (1) Term Frequency -- sentences containing frequently used meaningful words score higher. (2) Position -- the first and last sentences get a bonus because they typically contain key points. (3) Length -- medium-length sentences (8-30 words) get a small bonus as they tend to be more informative than very short or very long ones.
What is the minimum text length?+
You need at least 3 sentences for the summarizer to work. For best results, provide at least 5-10 paragraphs of text so the algorithm has enough content to identify the most important sentences.
Is my text sent to any server?+
No. All processing happens in your browser using JavaScript. Your text is never uploaded, stored, or shared with any third party.
Can I summarize text in other languages?+
The scoring algorithm works with any Latin-script language, though the stop-word list (common words filtered out) is optimized for English. Non-English text may produce slightly less accurate results.
Why use this instead of ChatGPT?+
This tool is instant (no waiting for AI generation), free (no API limits), private (no data sent anywhere), and deterministic (same input always gives the same output). It also preserves your exact wording, which is important for academic and legal content where rephrasing could change meaning.
What does the reduction percentage mean?+
It shows how much shorter the summary is compared to the original. A 70% reduction means the summary contains 30% of the original word count. Higher reduction means a more concise summary.
Can I use this for academic papers?+
Yes. Since it uses extractive summarization (your exact sentences), it is suitable for creating abstracts or executive summaries. Always review the output to ensure the key points of your paper are included.