“Indexia is AI at its best: a tool that combines superhuman power with uniquely human judgment. It doesn't just take over the task of indexing a book; it enables you to be integral to the process, which is exactly how any self-respecting author would want it to be.”
AI Book Indexing Tool
Upload your PDF. Get a professional index. Done.
Upload your PDF. Get a publication-ready index. Our AI extracts terms, identifies relationships, and formats everything automatically.
Indexia in action. AI-powered indexing that just works.
Superpowered AI book indexing
Upload your PDF and Indexia does the rest. Our AI analyzes your entire manuscript, extracts key terms, and builds a complete index automatically. Export to Word or XML—ready for your publisher.
No configuration needed. The AI identifies important concepts, maps relationships between ideas, and formats everything to professional standards. Most indexes are ready in under 30 minutes.
Want to make tweaks? The built-in editor lets you refine anything. But most authors export as-is and move on.
A complete, publication-ready index—automatically generated from your PDF.
Your data stays yours
Authors trust us with their unpublished manuscripts. We take that seriously.
No AI training on your content
We use third-party AI systems and pay per query. Your manuscripts are never used to train AI models—ours or anyone else's.
We never sell your data
Your documents and indexes are yours alone. We don't sell, share, or monetize your content in any way.
Delete anytime
You have full control. Delete your project from the dashboard and all associated files are permanently removed from our servers.
Secure infrastructure
Your data is stored on encrypted servers with industry-standard security. We use the same infrastructure trusted by major enterprises.
What authors are saying
“I used Indexia and it made my experience indexing my forthcoming book much faster and more efficient. It puts the author—the person who best knows the book—directly at the center of the indexing process to make decisions about what belongs in the index and what does not.”
“A.I. told me to check out Indexia, and I am glad I did. It wasn't expensive at all, especially relative to the hours I saved. You give it instructions and it builds an Index, then you get to fine tune it. And Indexia's team was super-helpful when I had questions. I didn't expect that.”
“I couldn't believe how fast my index was generated. I went through and cross referenced the index with my PDF and everything was accurate. Indexia was beyond useful. My needs were met in a very short turn around time. I'm very impressed with the software and customer support. I highly recommend Indexia.”
“Indexia is AI at its best: a tool that combines superhuman power with uniquely human judgment. It doesn't just take over the task of indexing a book; it enables you to be integral to the process, which is exactly how any self-respecting author would want it to be.”
“I used Indexia and it made my experience indexing my forthcoming book much faster and more efficient. It puts the author—the person who best knows the book—directly at the center of the indexing process to make decisions about what belongs in the index and what does not.”
“A.I. told me to check out Indexia, and I am glad I did. It wasn't expensive at all, especially relative to the hours I saved. You give it instructions and it builds an Index, then you get to fine tune it. And Indexia's team was super-helpful when I had questions. I didn't expect that.”
“I couldn't believe how fast my index was generated. I went through and cross referenced the index with my PDF and everything was accurate. Indexia was beyond useful. My needs were met in a very short turn around time. I'm very impressed with the software and customer support. I highly recommend Indexia.”
Who it's for
Authors, Journalists, Newsletters & Blogs, Organizations & Researchers, Professional Indexers, Scripture & Theological Works
Export your index to whatever format works for your use case.
Authors
Edit anything you want—or export as-is. Our powerful AI features do the heavy lifting—extracting terms, identifying relationships, and organizing entries—while you make the final editorial decisions.
Export with paragraph headers for easy navigation, or use AI-powered trim to hit your publisher's required index length instantly. No more agonizing over what to cut.
Upload your manuscript, refine the AI-generated index, and export a publication-ready document—all in one streamlined workflow.
Journalists
Make large document collections navigable for your audience. Create public indexes that let readers search and explore primary sources themselves—with every term linked back to the original text.
We used Indexia to index the Epstein files released by the House Oversight Committee—thousands of pages, 6,000+ extracted terms, all publicly searchable.
Explore hidden connections between the terms in your document.
Index your Substack; the blue links link to the term on the original page.
Newsletters & Blogs
Turn your blog or website into a searchable knowledge base. Indexia can create a comprehensive web index of your content—with every term linking directly to the original page.
Export your index as shareable Markdown and embed it anywhere. Every entry links back to your content, driving traffic and helping readers discover your archive.
Perfect for content creators with years of posts, documentation sites, or anyone who wants their audience to find exactly what they're looking for.
Organizations & researchers
For agencies, businesses, and researchers dealing with lengthy internal reports, white papers, or archives—Indexia makes your documents searchable and navigable fast.
Turn reams of internal content and dense reports into organized reference material that your team and stakeholders can actually use. Perfect for compliance documentation, research archives, and institutional knowledge bases.
For example, here is an Indexia index of the Federal Reserve's Beige Book; this took about 15 minutes—100% out of the box, no human editing required.
An interactive index of the Federal Reserve Beige Book - November 26, 2025
Retain complete control over your index. Delete, merge, xref, and more.
Professional indexers
Speed up your workflow without giving up control. Indexia helps you identify terms and relationships faster, but every decision stays in your hands.
Think of it as a skilled assistant that does the heavy lifting—so you can focus on the craft of indexing.
Scripture & Theological Works
Create professional scripture indexes for commentaries, theological books, and devotionals. AI extracts Bible references across Protestant, Catholic, Hebrew, and Septuagint canons.
AI identifies scripture mentions throughout your manuscript and organizes them by canonical book order—exactly as publishers expect.
AI extracts scripture references and organizes them in canonical book order
Blog
Learn more about indexing, AI, and document organization
How to Index Your Book Using AI
Learn how AI-powered tools like Indexia can help you create professional book indexes quickly and efficiently.
Read more →Introducing Indexia
Discover how Indexia is changing the way authors and professionals create document indexes.
Read more →Every Name in the Epstein Files
Explore how we used Indexia to create a comprehensive, searchable index of every name in the Epstein files.
Read more →Frequently Asked Questions
Everything you need to know about Indexia
Indexia is an AI-powered tool that helps you create professional back-of-book indexes (or other document indexes) quickly and efficiently. It extracts important terms, identifies relationships, and formats your index according to industry standards.
Watch our video demo to see Indexia in action.
Below is an index of On the Origin of Species, which has received zero human editing.
We offer a full refund within 30 days of purchase, provided that:
- You have not yet exported your index
- You understand that requesting a refund will result in the deletion of your project
To request a refund, please contact us at developers@indexia.tech.
We store the data that you upload to and generate with Indexia on our secure servers. You retain full control: you can delete everything at any time by deleting your index project via the user dashboard.
No. We use third-party AI systems and pay per query so that the providers cannot train on your content or use it to improve their own models.
Currently, we use OpenAI. We plan to add additional model providers in the future.
We charge $0.0015 per token, where one token equals roughly one word of your book. For example, indexing a 60,000-word manuscript would cost about $90.
After uploading your PDF (during project creation), you'll receive a cost estimate — and we won't run any AI processing or store anything until you confirm payment.
Once you pay:
- We automatically parse your PDF, extract indexable terms, and infer relationships between them.
- You receive a near-complete index in our viewer, which you can refine manually (adding/deleting terms, merging entries, creating cross-references and sub-entries).
- The result is a polished index you can export or publish.
Absolutely. Indexia is designed to deliver a strong first draft, but also to allow full manual editing. You can:
- Add or delete terms
- Merge similar entries
- Create cross-references or sub-entries
- Use our AI assist to spot potential duplicates or similar terms to speed the process
You can export your finished index in multiple formats: Microsoft Word (.docx), RTF, LaTeX (.tex), or CDXF/IXML (compatible with professional indexing software like Cindex and Sky Index). Additionally, you can publish a public, read-only link to the index so collaborators or the public can view it without editing access.
For customer support, questions, or feedback, please email us at developers@indexia.tech. We typically respond within 24 hours.
