# Free AI search tools · Terradium

Free checks for how AI answer engines see your website. They need no sign-up.

- [AI crawler checker](https://terradium.io/tools/ai-crawler-checker): whether robots.txt lets ChatGPT, Claude, Perplexity and Gemini's crawlers in, whether your llms.txt is valid, and whether your content is server-rendered. Includes a live, embeddable badge.
- [AI visibility checker](https://terradium.io/tools/ai-visibility-checker): asks ChatGPT and Google AI Overviews a question your buyers ask, and shows whether each answer mentions your brand and cites your website.