AI Book Summary Generator
Generate chapter + key-idea summaries from book-length text using extractive summarization. Pure-JS engine: sentence scoring (TF + position + keyword + cue), chapter detection, premise + key ideas + chapter breakdown + takeaways + Q&A + outline. 3 depth levels. 100% client-side — optional BYO-key LLM enhancement. Nothing uploaded.
About AI Book Summary Generator
Generate chapter + key-idea summaries from book-length text using extractive summarization. Pure-JS engine: sentence scoring (TF + position + keyword + cue), chapter detection, premise + key ideas + chapter breakdown + takeaways + Q&A + outline. 3 depth levels. 100% client-side — optional BYO-key LLM enhancement. Nothing uploaded. Everything runs locally in your browser — your data never leaves your device.
How to use
- Enter your input in the tool above.
- Adjust any options to your preference.
- Use the Copy or Download buttons to save the result.
- Everything happens locally — your data never leaves your browser.
FAQ
How does the book summary generator work?
Paste your book text (or chapter-by-chapter). The tool uses extractive summarization — it scores sentences by word frequency (TF), position in the chapter, keyword presence, and cue words ('importantly', 'in conclusion', etc.) — then selects the top sentences for each chapter. It also extracts a premise, key ideas, takeaways, and generates Q&A. Everything runs locally in your browser.
Can I summarize a full book at once?
Yes. The tool handles long text via hierarchical chunk-and-merge: it splits the text into 5000-character chunks at sentence boundaries, summarizes each chunk, then merges the chunk summaries into a final result. Chapter detection works via patterns like 'Chapter 1', 'Part I', 'Introduction', 'Preface', etc.
What depth levels are available?
Three: brief (1-2 sentences per chapter), standard (3-5 sentences), and detailed (5-8 sentences with key ideas and Q&A). The brief level is great for quick scanning; detailed is for deep study notes.
What extra features does this tool have compared to others?
(1) Extractive summarization with TF + position + keyword + cue scoring. (2) Chapter detection (Chapter/Part/Book/Section/Prologue/Epilogue/Preface/Introduction/Foreword/Appendix + all-caps headings). (3) Hierarchical chunk-and-merge for long text (5000-char chunks). (4) Premise extraction. (5) Key ideas extraction. (6) Chapter breakdown. (7) Takeaways. (8) Q&A generation. (9) Outline mode. (10) 3 depth levels. (11) History (localStorage, last 20). (12) Shareable URL. (13) Optional BYO-key LLM enhancement. (14) Markdown/JSON/text export. (15) Reading time estimate.
Is my data sent anywhere?
No. All summarization runs locally. The only network call is if you paste your own LLM API key and click 'Enhance with LLM' — that request goes directly from your browser to the LLM provider you choose (OpenAI or Anthropic).
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