AI Text Summarizer
Summarize long articles, essays, reports, and documents into key takeaways with instant local processing.
Runs on your device by default. The optional cloud AI mode sends your input to Google Gemini.
What the AI Text Summarizer does
Long reports, articles and email threads usually make three or four points. This summariser finds them for you, in two ways. The on-device engine runs in your browser: it scores every sentence by how much of the text's key vocabulary it contains, favours sentences that open paragraphs, avoids picking two that say the same thing, and returns the most informative ones in their original order — nothing leaves your device. The optional Cloud AI mode sends the text to Google Gemini, which writes a new summary in its own words, as a paragraph or as bullet points.
How to summarise text
- Choose the engine: On-device for private, instant summaries, or Cloud AI for a rewritten summary from Google Gemini.
- Paste your text or open a .txt or .md file. A few paragraphs or more gives the best results.
- Pick the length — Short, Medium or Detailed — and whether you want a paragraph or bullet points.
- Press Summarise, or Ctrl + Enter.
- Check the word counts to see how much shorter the summary is, then copy it or save it as a text file.
The AI Text Summarizer runs on your device by default. If you switch to the optional cloud AI mode, your input is sent to Google's Gemini model to produce the result.
When to use it
Getting through long reading
A 2,000-word report takes about nine minutes to read. A medium summary gives you the main points in under one, so you can decide whether the full document deserves your time.
Meeting notes and email threads
Paste a long thread or a transcript and ask for bullet points to get the decisions and open questions without re-reading every message.
Studying and research
Summarising each section of a chapter in turn is a quick way to build revision notes. Use the on-device engine for exact sentences you can quote, and Cloud AI when you want a shorter paraphrase.
Good to know
- The on-device summary only uses sentences from your text, so it never invents facts. Cloud AI writes new sentences; check names and numbers against the original.
- Very short texts cannot be summarised much. If every sentence is kept, the text is already about as short as it can be.
- Remove headers, footers and navigation text before pasting a web page, or they will compete with the real content.
- For documents longer than a few thousand words, summarise section by section for better results.
Frequently asked questions
Is my text uploaded to a server?
Is there a limit on text length?
What is the difference between the two engines?
Is my text stored or used for training?
Does it work for languages other than English?
Related tools
LLM Token Counter
Estimate BPE tokens, context limits, and API costs for GPT-4o, Claude, and Gemini.
AI Prompt Optimizer
Build structured XML system prompts with role isolation and negative rules.
AI Function Calling Schema
Build OpenAI Structured Output and Anthropic Tool Call JSON schemas.
Prompt & Context Cleaner
Strip markdown, HTML, comments, and mask PII to reduce token consumption.