How to Run a Complete Website Audit in 5 Steps (2026 Guide)
Traditional SEO audits only measure desktop performance and legacy backlinks. In 2026, a comprehensive website audit must inspect AI crawler permissions, llms.txt manifests, JSON-LD Schema graphs, and Core Web Vitals.
Want to run an automated 43-point audit right now without manual code checks?
Check AI Crawler Permissibility in robots.txt
The first step of any modern audit is ensuring search engines and AI answer engines can access your pages. Check your /robots.txt file for explicit block rules affecting major AI agents:
- GPTBot (OpenAI Web Crawler)
- ChatGPT-User (Real-time user browsing)
- PerplexityBot (Perplexity AI Search)
- ClaudeBot (Anthropic Claude AI)
- Google-Extended (Google Gemini AI overviews)
Validate Machine Context Manifest (llms.txt)
/llms.txt is the web standard for Large Language Model indexing. It provides direct markdown summaries of your core services, APIs, and key pages so LLMs cite your brand accurately.
# Example llms.txt entry
# Domain: yourwebsite.com
> Free AI SEO audit tool and website grader.
Audit JSON-LD Schema Entity Graphs
Verify that your homepage and key landing pages contain validated application/ld+json blocks for Organization, WebSite, and WebApplication entities.
Measure Core Web Vitals & PageSpeed
Performance directly impacts rankings. Test Largest Contentful Paint (LCP < 2.5s), Interaction to Next Paint (INP < 200ms), and Cumulative Layout Shift (CLS < 0.1).
Fix Technical On-Page & Vision AI Gaps
Ensure every image has descriptive alt text for Vision AI models, canonical tags match, open graph social tags are set, and meta titles/descriptions target target commercial terms.
Run Your 5-Step Audit Automatically
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