# Rank AI Signal

> AI SEO and GEO visibility platform. We help websites get understood, cited, and ranked by ChatGPT, Claude, Perplexity, Gemini, and Google AI Overviews.

Rank AI Signal provides free tools and guides for Generative Engine Optimization (GEO). Our toolkit focuses on three measurable signals AI crawlers rely on: structured data quality, semantic readability, and llms.txt declarations.

## Core Tools

- [AI Visibility Checker](https://rankaisignal.com/en/tools/ai-visibility-checker): Audit how clearly Google and AI search engines can understand, cite, and rank any URL. Returns GEO score, schema coverage, entity extraction, and engine-specific readability.
- [llms.txt Generator](https://rankaisignal.com/en/tools/llms-txt-generator): Build a spec-compliant llms.txt file so LLM agents can efficiently discover and summarize a website.
- [Schema Audit Tool](https://rankaisignal.com/en/tools/schema-audit-tool): Detect missing JSON-LD schemas (FAQPage, Organization, Article) that block AI citation eligibility.

## Engine-specific Guides

- [How to Rank in ChatGPT](https://rankaisignal.com/en/how-to-rank-in-chatgpt): Step-by-step blueprint for getting cited by SearchGPT and ChatGPT browsing.
- [How to Rank in Perplexity](https://rankaisignal.com/en/how-to-rank-in-perplexity): Authority and grounding tactics for Perplexity Answer Engine.
- [How to Rank in Claude](https://rankaisignal.com/en/how-to-rank-in-claude): Long-form structure and schema patterns Claude prefers.
- [ChatGPT SEO Checker](https://rankaisignal.com/en/chatgpt-seo-checker): GEO checklist focused on ChatGPT-specific signals.
- [Perplexity SEO Checker](https://rankaisignal.com/en/perplexity-seo-checker): GEO checklist focused on Perplexity-specific signals.
- [Claude SEO Checker](https://rankaisignal.com/en/claude-seo-checker): GEO checklist focused on Claude-specific signals.

## Blog

- [Index](https://rankaisignal.com/en/blog): All articles on GEO, AI search, and LLM visibility.

## Languages

- English: https://rankaisignal.com/en
- 简体中文: https://rankaisignal.com/zh
- 日本語: https://rankaisignal.com/ja

## Sitemap

- https://rankaisignal.com/sitemap.xml