Agent-friendly documentation: a Markdown index for AI agents is at /llms.txt. Every page is also available as clean Markdown by appending .md to its URL (e.g. /pricing.md), or by requesting it with an Accept: text/markdown header.

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FREE TOOLS

Check It, Fix It, Ship It

Free, instant tools for SEO and AI-agent readiness. No login, no email, no gate — enter a URL and get the answer, downloadable on the spot.

AI-agent readiness

AFDocs Checker

Score any docs site against the Agent-Friendly Documentation spec — 23 checks, one grade.

Featured

llms.txt Validator

Validate a site's llms.txt against the llmstxt.org structure.

AI Search Readiness Checker

See how ready a page is to be cited by AI search engines.

On-page / technical

Meta Tag Analyzer

Audit a page's title, description, canonical, and robots tags in one pass.

Open Graph Checker

Verify og: and twitter: tags so links unfurl with the right title and image.

Robots.txt Tester

Parse any site's robots.txt: groups, rules, sitemap directives, and blockers.

Heading Structure Extractor

Extract a page's h1-h6 outline and catch skipped levels and duplicate H1s.

Sitemap Validator

Validate an XML sitemap's structure, URLs, and freshness fields.

Alt-Text Checker

Find images missing alt text on any page.

Schema Validator

Extract and validate a page's JSON-LD structured data.

Redirect & SSL Checker

Trace a URL's redirect chain and confirm its SSL setup.

Broken Link Checker

Find dead links on a page before your visitors do.

Console Error Scanner

Load a page in a real browser and capture its console errors.

Authority

Domain Authority Checker

Check any domain's Open PageRank authority score.

Generators

Meta Tag Generator

Write title, description, OG, and Twitter tags with live length checks.

Robots.txt Generator

Compose a clean robots.txt from user-agent rules and a sitemap URL.

UTM Builder

Assemble campaign URLs with source, medium, and campaign parameters.

JSON-LD Generator

Generate Organization, Article, or FAQ structured data ready to paste.