Upload a PDF and our AI will extract key terms with page references and organize them into a back-of-book style index. Generating and previewing the index is free — you only pay $79 if you want to unlock and download it.
Upload your PDF to get started
Drop a PDF here or click to select a file
Choose PDFSupports PDF up to 50 MB · Text-searchable PDFs work best
A real, unedited excerpt from Darwin's On the Origin of Species
Macleay, 427 Macrauchenia, 323 Madeira, 48, 135, 314, 339, 390, 393, 402 Madeira Beetles, 135 Magpie, 212 Maize, 270 Malacca, 375 Malay Archipelago, 2, 299, 395 Male Weapons, 88 Malpighiaceae, 417 Malthus, 5, 63 Mammals, 289, 303, 395
This is the draft before any editing: you then refine headings and add subentries in the editor, and export as TXT, DOCX, or PDF. See how it compares with Darwin's original index
Sign in with Google and upload your PDF. Text-searchable files up to 50 MB.
The AI reads your document, extracts key terms with page references, and groups related concepts. Takes 10-15 minutes.
Review the generated index in an interactive editor. Edit terms, merge duplicates, then export to TXT, DOCX, or PDF.
Text-searchable PDFs (exported from Word, InDesign, LaTeX)
Non-fiction: business, academic, technical, reference books
50-400 pages — ideal length range for AI analysis
Niche or specialist terminology may need manual editing after generation
Scanned-image PDFs without embedded text produce poor results
Fiction indexing is experimental — character and theme extraction is less reliable
Generating and previewing the index is free — no credit card required. $79 to unlock and download.
Upload your PDF to get started
Drop a PDF here or click to select a file
Choose PDFSupports PDF up to 50 MB · Text-searchable PDFs work best
Sign in with Google, upload a PDF, and the AI generates a draft index with hierarchical terms and page references. Generating and previewing the index is free — no credit card required. To unlock and download the final index as TXT, DOCX or PDF, you pay $79 (one-time, per book, no subscription).
We support text-searchable PDF files up to 50 MB. Scanned-image PDFs without embedded text will produce poor results. Most PDFs exported from Word, InDesign, or LaTeX work well.
Typically 10-15 minutes for a 200-page book. Shorter documents process faster. You'll see real-time progress updates during processing.
Yes. The AI generates a draft that you review in an interactive editor. You can rename terms, merge duplicates, add entries, delete irrelevant ones, and adjust page references before exporting.
You can export as plain text (TXT), Microsoft Word (DOCX), or PDF. All formats include proper formatting with hierarchical entries and cross-references.
The AI produces a solid first draft that covers most of the terms a professional indexer would select. You should budget 30-60 minutes of editing time to refine terminology, add niche terms, and verify cross-references.
Sign in with Google, upload a PDF, and see your draft index in about 15 minutes. $79 to unlock and download — only when you're happy with the output.
Get startedNo credit card required to start