AI Text Summarizer
100% private — runs on your device, never uploaded. Works offline once loaded.
Paste a long article, report or passage and get a concise summary from an AI model that runs entirely on your device. Nothing you paste is ever uploaded.
How on-device summarization works
This tool runs a distilled BART model (distilbart-cnn) directly in your browser using transformers.js and WebAssembly. It reads your text and generates a shorter abstractive summary — meaning it rewrites the key ideas in new sentences rather than just extracting existing ones.
Because the whole model runs locally, the article, email or report you paste is never sent to a server. That makes it safe for drafts, internal documents and anything you would rather not upload to a cloud AI service.
Getting the best summary
The model works best on well-structured prose — news articles, blog posts, reports and essays. Very short text has little to compress, and extremely long input may need to be summarized in sections.
- Paste at least a few paragraphs for a meaningful summary
- Use the length control to trade brevity for detail
- For very long documents, summarize section by section
What to expect from a small model
On-device models are compact, so summaries are quick and private but not as polished as a large cloud LLM. Treat the output as a strong first draft: accurate on the main points, but worth a quick review before you rely on it.
Frequently asked questions
Is my text uploaded anywhere?
No — the model runs entirely in your browser, so your text is never transmitted to any server.
What model does it use?
A quantized distilbart-cnn summarization model served locally from Whiztools and run with transformers.js.
Why is the first summary slow?
The one-time model download (~150 MB) happens on first use and is then cached; subsequent summaries are much faster.
Is there a length limit?
Very long inputs may be truncated by the model. For long documents, summarize a few paragraphs or one section at a time.
Does it work offline?
Yes, once the model has been downloaded and cached, summarization works without an internet connection.
Is the summary always accurate?
Small models can occasionally drop nuance or a detail, so review the summary for anything important before using it.
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