Generate candidates
The system identifies people, concepts, themes, and headings that may belong in the index.
AI Book Indexing Software for Back-of-Book Indexes
IndexerLabs turns a manuscript into a structured, reviewable back-of-book index with source-grounded locators, subentries, cross-references, and editor tools that keep the human review pass practical.
- From upload to export-ready draft in under 2 hours
- $199 flat fee per back-of-book index
- Unlimited AI-assisted review, edits, and refinements
1,000+ training indexes
IndexLM-1.0 was trained on more than 1,000 real-world back-of-book indexes. IndexLM announcement
20,000 benchmarked locators
The locator verification work was tested across 20,000 locator claims. Verifying 20,000 index locators at scale
$199 flat fee
Subject indexing is priced per book, including generation, review tools, and export. Pricing
Trusted by authors from:
Built on purpose-trained indexing models
Generic chatbots are not trained to make editorial indexing decisions. For this reason, IndexerLabs trained custom models on more than 1,000 real-world book indexes to ensure professional quality output.
In our 120-run benchmark on The Oxford History of the French Revolution, IndexLM-1.0 retained far more human-selected topics than general-purpose models when editing a publication-grade index.
Why IndexerLabs
Powerful AI Index Editor
We don't just give you an index. We give you a superpowered indexing workbench to rapidly verify, edit, and fine-tune your index, with unlimited AI-powered editing actions.
Rapid Turnaround
Traditional indexing timelines are measured in days. IndexerLabs can turn around a complete draft in under 2 hours.
Traditional indexing 7-10 days
IndexerLabs < 2 hours
Secure & Private
We run all our AI systems on our private servers in Nuremberg, Germany. We do not send your data to any third party AI providers. We never train on your indexes or share them with third parties for any reason. You can delete all your data at any time.
Affordable
Flat $199/book pricing keeps professional indexing accessible without page-count surprises.
Traditional indexing $3,000+
IndexerLabs $199/book
Specialized models plus inspectable output.
The core problem is not generating index-like text. A useful index needs editorial selection, consistent wording, subentry structure, accurate locators, and production export.
IndexerLabs combines IndexLM-1.0, a purpose-trained subject indexing model, with verification and review tools.
Workflow
How the software works
Review the structure
Optional Checkpoints let you remove weak terms, add missing ones, and set the entry budget before mass extraction.
Verify locators
Every locator claim is tied to source evidence and can be inspected in the editor or Quick Check.
Export the result
Export a finished index for publication workflows.
FAQ
Frequently asked questions
Does IndexerLabs use AI?
Yes, IndexerLabs employs the use of custom-trained Artificial Intelligence (AI) models to automate the process of indexing. We've custom-trained an AI model on 1,000 real-world indexes, which significantly improves accuracy and indexing taste. Read more about this model, IndexLM-1.0, in our blog post.
Is my data secure?
Yes, and significantly more so than other AI products. We host all our models on our own servers, so third parties never get your data. We do not send your data to any third parties like OpenAI or Google. Uploaded documents stay available for the index editor until you delete them from your dashboard. We never use your data for improving or training our product under any circumstances.
Can I see an example index?
You can view our Oxford History of the French Revolution comparison side by side with its original printed index.
You can also view a shorter Neomania demo, using a book from Open Book Publishers.
Do you offer refunds?
We offer full refunds within 7 days of purchase.
To request a refund, please contact us at support@indexerlabs.com.
How much does your service cost?
Subject book indexing is a flat $199 per book. Volume pricing is available for publishers, series, and recurring workflows.
Can I edit my index after it's created?
Yes. While we aim to produce an elegant, high-quality index that adheres to your specifications on the first attempt, we allow for manual and AI-powered editing if there's anything you want to change, free of charge.
Can I export my index?
You can export your index into Microsoft Word (.docx), PDF (.pdf), plain text (.txt), or CDFX/IXML (used by professional indexing tools like Cindex).
Additionally, if you need any specific output formats tailored to your publisher's specifications, feel free to email us at support@indexerlabs.com at any time and we can help make a custom output format at no extra charge.
How do I contact your team?
For support, questions, or feedback, please email us at support@indexerlabs.com. We typically respond within 48 hours.
How long does it take to generate an index?
After you upload a document, Subject Indexing usually takes 1-3 hours, depending on the length and complexity. In many cases, a 300-page book can be processed in under an hour.
Scripture Indexing usually finishes within 30 minutes of upload.
Use the software on your next manuscript.
Start with a finished manuscript, generate a draft index, then use the editor to review the structure and locators before export.