Document Summarizer: Turn Documents and eBooks into a Mind Map
Upload a Word file, text file, or EPUB book and get its structure back as an editable mind map
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How It Works
Upload the File
Drop in a DOCX, TXT, Markdown, SRT, or PDF file up to 10 MB, or use the eBook upload for EPUB files up to 20 MB
Check the Credit Cost
MindLM reads the text and shows the credit cost before anything runs, so you know what the summary will take
AI Builds the Outline
Chapters, headings, and sections become branches, with the key points of each one underneath
Edit and Export
Collapse branches, fix any node inline, then export to PNG or Markdown (SVG on Pro and Max) or share a link
Why MindLM?
Word, Text, and Subtitle Files
DOCX, TXT, Markdown, and SRT files are read directly. SRT is handy for lecture or meeting transcripts you already have.
Whole Books From EPUB
Upload an EPUB up to 20 MB. Max reads up to 600,000 characters, roughly a 100,000-word book, in one pass.
Keeps the Author’s Structure
Chapters and headings become the branches of the map, so you can still see where each point came from.
Editable and Exportable
Every node can be renamed, moved, or deleted. Export PNG and Markdown on Free, SVG on Pro and Max.
Popular Use Cases
See what people actually use it for — chances are your problem is on this list.
Decide whether a book is worth reading
Upload the EPUB and read the chapter-by-chapter outline in five minutes before you commit a week of evenings to it.
Turn a long Word report into a briefing
A 40-page DOCX from a colleague becomes a one-screen outline you can take into the meeting, with every section still in its place.
Map a lecture from its subtitle file
Already have the SRT for a recorded lecture or meeting? Upload it and get the topics and examples as a tree without re-watching.
A document summarizer that keeps the outline
Most document summarizers hand back five bullet points. That works for a two-page memo, but a 40-page report or a contract loses its shape: you can't tell which point came from the executive summary and which one was a caveat buried in an appendix.
MindLM summarizes a document as a mind map instead. The chapters and headings become the first-level branches, the key points of each section sit underneath, and you can collapse whatever you don't need right now. It works with the files people actually have lying around: Word documents, plain text, Markdown notes, subtitle files, and PDFs.
A book summarizer for EPUB files
The same approach works for whole books. Upload an EPUB through the eBook upload and MindLM reads the chapters in order, so the map follows the book's own structure rather than a list of "key takeaways" with no sense of where they came from.
Use the book summarizer to decide whether a book deserves a week of evenings, to review one you read last year, or to prepare for a book club without rereading every chapter. How much of a book fits depends on your plan: Max reads up to 600,000 characters, which covers a typical nonfiction book of 80,000–100,000 words in one pass.
The book summarizer uses the same editor as everything else, so you can rename chapters, drop the ones you skipped, and export the outline as Markdown for your reading notes.
Supported formats and file sizes
| Format | Upload | Max file size |
|---|---|---|
| DOCX (Word) | Document upload | 10 MB |
| Document upload | 10 MB | |
| TXT, Markdown (.md) | Document upload | 10 MB |
| SRT subtitles | Document upload | 10 MB |
| EPUB | eBook upload | 20 MB |
Old .doc files should be saved as DOCX first. Scanned pages have no text layer, so save them as JPG or PNG and use the image input, which runs OCR.
How much text each plan reads
File size only decides whether a file can be uploaded. What counts for the summary is the text inside it:
| Plan | Characters per file | Roughly equals |
|---|---|---|
| Free | 100,000 | about 30 pages, or 16,000 words |
| Pro | 300,000 | about 100 pages, or 50,000 words |
| Max | 600,000 | about 200 pages, or 100,000 words |
There's no separate page limit. If a file runs past your plan's limit, the text beyond it is trimmed, and MindLM shows the credit cost before anything runs.
Export formats
- PNG: a high-resolution image for slides and notes. Free plan.
- Markdown: a nested outline for Notion, Obsidian, or any Markdown editor. Free plan.
- SVG: a vector file that stays sharp at any size. Pro and Max.
- Share link: a public, read-only page for anyone without an account.
There is no direct PDF export of the map yet.
When another tool fits better
If your file is a PDF with a lot of chapter structure, the PDF summarizer page covers scanned files and page limits in more detail. For arXiv preprints and journal articles, see research paper to mind map. And if what you want to summarize is an article on the web, paste the link into the webpage summarizer instead of saving it as a file first.
Still comparing products? Our roundup of free Mapify alternatives lists each tool's free-tier limits and starting price side by side.
Frequently Asked Questions
Which file formats does the document summarizer support?
PDF, DOCX, TXT, Markdown (.md), and SRT subtitle files up to 10 MB, plus EPUB eBooks up to 20 MB through the eBook upload. Old .doc files should be saved as DOCX first. For a webpage, use the webpage summarizer; for scanned pages, save them as images and use the image input, which runs OCR.
Is there a page limit?
There is no page count; the limit is characters of text per file. Free reads up to 100,000 characters (about 30 pages of dense text, or 16,000 words), Pro up to 300,000 (about 100 pages), and Max up to 600,000 (about 200 pages). Text past your plan’s limit is trimmed.
Can it summarize a whole book?
Yes. As a book summarizer it works within your plan’s limit: a typical nonfiction book of 80,000–100,000 words fits in Max’s 600,000 characters. Pro’s 300,000 covers roughly the first half, and Free’s 100,000 covers the first few chapters, which is often enough to decide whether the book is worth reading.
What’s the difference between Free, Pro, and Max?
All three include documents and eBooks. Free gives 10 credits on signup plus 1 per daily login, up to 3 maps a day, and 100,000 characters per file. Pro ($4.99/month) adds 200 credits a month, 300,000 characters, SVG export, and no daily cap. Max ($9.99/month) adds 600 credits and 600,000 characters.
What can I export the summary to?
PNG for slides and notes and Markdown for Notion, Obsidian, or any outliner, both on Free. SVG is on Pro and Max. You can also share a public read-only link. There is no direct PDF export.
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