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PageIndex

Helps AI find answers in long reports by reading a document's table of contents the way a person would.

What it does

Most tools that let AI search documents chop them into small pieces and look for pieces with similar wording. PageIndex takes a different approach. It builds a tree-shaped index of the document, like a detailed table of contents, and lets the AI reason its way to the right section.

Its makers say this gives answers you can trace back to an exact place in the document. They suggest it for long, complex material such as financial reports, legal documents, manuals and textbooks.

It can run on your own computer with your own AI model account, or connect to the PageIndex cloud service.

Who it's for

Developers building tools that answer questions about long professional documents.

Can I use it without coding?

Developers only. Used from Python code with an AI model account. A separate hosted app exists for non-developers. New to this? Start here.

Can I run it?

Cost
Free, but needs an AI accountThe software is free, but it uses an online AI service (like OpenAI or Anthropic), which usually charges for use.
Computer
An ordinary computer is fine
Privacy
Sends what you give it to an online service
API key
Needed. An API key is a password-like code from an online AI service. What's that?

Try it

Using Claude Code, Cursor or another AI coding assistant? Paste the prompt and it will walk you through the setup.New to this?

Before you install

  • Only download from the official GitHub page. Copies with similar names exist for many popular projects.
  • License (MIT): Very permissive: free to use, change and share, including for business.
  • Keep your API key private. Never paste it into websites or share it, and set a spending limit with the AI service.
  • What you type or upload is sent to an online service. Avoid sharing private or sensitive information.
  • More on staying safe

Where people are talking about it