---
title: "Free AI Search Tools: Crawler, llms.txt and GEO Checks"
description: "Free tools that check how AI search engines and agents read your site: AI crawler access, llms.txt, Content Signals and a full GEO audit. No account."
url: https://seenlens.com/tools
last_updated: 2026-11-06
---

# Free AI search tools

These free tools each check one part of how AI search engines and agents read your site. Every tool runs against a live URL, shows the evidence it found and links to the fix guide. None of them needs an account or an email address.

By SeenLens. Last updated: 2026-11-06

## Which tool to use

| Your question | Tool |
| --- | --- |
| Does my robots.txt or firewall block GPTBot, ClaudeBot or PerplexityBot? | [AI crawler checker](https://seenlens.com/tools/ai-crawler-checker) |
| Is my llms.txt file valid, and what should it contain? | [llms.txt checker](https://seenlens.com/tools/llms-txt-checker) |
| How do I tell AI systems which uses of my content I allow? | [Content Signal generator](https://seenlens.com/tools/content-signal-generator) |
| How visible is this page to AI search overall? | [Free GEO audit](https://seenlens.com/tools/geo-audit) |
| Is this page ready to be quoted as a direct answer? | [Free AEO audit](https://seenlens.com/tools/aeo-audit) |

## How the tools relate to the full scan

Each tool runs a subset of the [43 checks](https://seenlens.com/how-it-works) in the full SeenLens scan, with the same rules and the same evidence. Use a tool when you have one question. Use the [full scan](https://seenlens.com/) when you want one score for a page and a ranked list of everything that stops AI search from reading it.

The tools fetch only public URLs, at most a few requests per check, with the documented [SeenLensBot](https://seenlens.com/bot) user agent or the crawler user agent the check needs. They do not store the text of your pages.

## Pages in this section

- [AI crawler checker](https://seenlens.com/tools/ai-crawler-checker): Free tool: reads robots.txt for 14 crawlers (GPTBot, ClaudeBot, PerplexityBot and more) and tests for firewall blocks.
- [llms.txt checker](https://seenlens.com/tools/llms-txt-checker): Free tool: validates /llms.txt against the llmstxt.org format, tests linked URLs, and generates a file in the browser.
- [GEO audit](https://seenlens.com/tools/geo-audit): Free tool: a 43-check GEO audit of one URL, scored from 0 to 100 across five dimensions, with the top three issues.
- [AEO audit](https://seenlens.com/tools/aeo-audit): Free tool: an AEO audit checklist of 12 steps, with a scan that tests ten of them on one URL.
- [Content Signal generator](https://seenlens.com/tools/content-signal-generator): Free tool: builds a robots.txt block with Content-Signal values for search, ai-input and ai-train.
- [Schema checker](https://seenlens.com/tools/schema-checker): Free tool: reads the JSON-LD on a page, reports syntax errors per block, lists schema.org types and flags common missing properties.