5-Step Technical Checklist 7 Min Read

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.

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1

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)
2

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

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3

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.

4

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).

5

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.

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