Web Baseline Checker Website Standards, SEO & Hygiene Auditor
Audit any website against core web standards and baseline hygiene: HTTPS, favicon, title, viewport, H1, header, footer, schema, robots.txt, sitemap.xml, and security headers.
The Core Website Baseline Standards
Just as the OWASP ASVS establishes baseline security criteria, modern web applications require a foundational baseline for crawlability, accessibility, document structure, and transport integrity.
1. Security & Protocol Baseline
Checks for strict HTTPS encryption, clean HTTP 200 responses, HSTS enforcement, and essential MIME and clickjacking security headers.
2. Document & SEO Essentials
Validates crucial HTML head tags: accurate <title>, meta descriptions, responsive <meta viewport>, character encoding, canonical URLs, and favicons.
3. Semantic DOM & Accessibility
Audits page structure for a single authoritative <h1> heading, semantic HTML5 landmarks (<header>, <main>, <footer>), and image alt accessibility.
4. Structured Data & Social Cards
Ensures rich snippet eligibility via Schema.org JSON-LD and verifies Open Graph / Twitter Card tags for high-converting social link shares.
5. Search & Agent Crawlability
Inspects discovery files (/robots.txt, /sitemap.xml, /llms.txt) and ensures search bots and AI models can index your content without obstruction.
Frequently Asked Questions
What is the Website Baseline Checker and why was it created?
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The Website Baseline Checker functions like an OWASP checklist for baseline website hygiene. It systematically verifies all core requirements that every modern website must implement — from SSL and viewport configuration to semantic landmarks, Schema markup, robots.txt, and sitemaps.
Why is having exactly one <h1> heading important?
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The <h1> tag represents the primary topic of the document. Having exactly one <h1> provides a clear semantic anchor for screen readers, search engine indexers, and AI summarizers.
How does the Baseline Score calculation work?
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The audit evaluates 22 core checks categorized into 5 functional areas. Each check has a severity weight (Critical, High, Medium, Low). Passing checks receive 100% of their weight, warnings receive 40%, and failing checks receive 0%. The composite score produces letter grades from A+ (90+) down to F (<50).
Can I export or share the audit findings?
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Yes. Once an audit completes, you can click 'Copy Markdown Report' to get a formatted markdown summary for GitHub issues/PRs or 'Export JSON' to download the raw audit payload.