Text Summarizer

What Is a Text Summarizer?

A text summarizer condenses a long passage into a short version that keeps the most important points. Paste an article, essay, or email and get a concise summary in an instant — useful for skimming long reads, drafting abstracts, or pulling the gist out of a wall of text.

How This Tool Works

This summarizer uses extractive summarization: it scores every sentence by how many important, frequently-used words it contains, then keeps the top sentences in their original order. The score for a sentence $s$ is:

$$\text{score}(s) = \frac{\sum_{w \in s} \text{tf}(w)}{\sqrt{|s|}}$$

where $\text{tf}(w)$ is how often word $w$ appears in the whole text and $|s|$ is the number of content words in the sentence. The $\sqrt{|s|}$ term prevents long sentences from winning just by being long, while still rewarding information density. Common stopwords (the, is, a, of…) are ignored so they don't skew the score.

Extractive vs Abstractive

Extractive summarizers (like this one) select and reorder existing sentences — fast, transparent, and never invent words. Abstractive summarizers rewrite the content in new wording, the way a human might, but need a large language model. Extractive is ideal when you want a faithful, verbatim shortening.

Works on Many Languages

Sentence splitting and scoring support both Latin-script text (English, Spanish, French, German…) and CJK text (Chinese, Japanese, Korean), with language-aware stopword filtering. Quality is highest on text with clear sentence punctuation.

Private by Design

Everything runs in your browser. Your text is never uploaded to a server, stored, or logged — consistent with TOOLEAD's privacy-first approach.