Text Summarizer
Condense long articles, reports, or notes into their key sentences — instantly and privately.
100% in your browser — files never leave your device
0 words
How the summarizer works
This is extractive summarization, not AI rewriting: the tool scores every sentence by how often its meaningful words (with common stop words like the, and, of filtered out) recur across the whole document, then keeps the highest-scoring sentences in their original order. It doesn't paraphrase or generate new text — every sentence in the output appears verbatim in the input.
Sentences in the first two positions get a small scoring boost, since lead sentences in articles and reports tend to carry more of the actual topic than sentences buried in the middle. The summary length slider controls what fraction of sentences survive that ranking, from a tight 10% down to a looser 60%.
Because it works purely on word frequency and sentence position, the summarizer does best on prose written in complete, self-contained sentences — articles, reports, essays. It's a poor fit for bulleted notes, chat transcripts, or code-heavy text, where the important information isn't concentrated in frequently repeated words.
Frequently asked questions
Is my text sent to a server or an AI model?
No. The summary is produced entirely in your browser using a frequency-based extractive algorithm. Nothing is uploaded, so even confidential documents stay private.
How does the summarizer choose sentences?
It scores each sentence by how often its meaningful words appear across the whole text, favors information-dense sentences, then returns the top-scoring ones in their original order. It extracts existing sentences rather than rewriting them.
What length should I pick?
The slider sets the share of sentences to keep. 20–30% works well for articles; raise it for dense technical text where most sentences carry weight, lower it for a quick gist.