Text Summarizer

It uses an extractive method: it does not rewrite the text, it scores each sentence by relevance (based on how often its most significant terms appear, ignoring stop words) and selects the best ones, keeping them in their original order. The result is a summary made of verbatim sentences from the original, not a paraphrase. All the computation happens in your browser.

No, and the difference matters. A generative AI model rewrites the ideas in new words (abstractive summary); this tool selects the most important sentences as they are (extractive summary). Extractive is instant, free, private and invents nothing, but it does not rephrase or connect separate ideas. For a faithful, fast summary it is more than enough; for fresh writing you would need an AI.

No. All the analysis happens in your browser, with nothing sent anywhere and no history stored. You can summarize internal documents, notes or confidential drafts without them leaving your device, and it works offline.

It is tuned for Spanish and English: it recognises the stop words (articles, prepositions, conjunctions) of both languages so as not to be misled by them when scoring sentences. With other languages it may give a reasonable result, but quality drops because it does not filter their stop words.

It depends what you want it for. A short summary is enough to grasp the gist of an article at a glance; a medium or long one keeps more nuance and is better if you will use it as a basis to study or write. Since the method is extractive, the longer the summary, the more original sentences it keeps and the less is lost along the way.