The Site Vitals - Free Website Audit Platform

The Site Vitals is an advanced, real-time website auditor and performance diagnostic engine. It evaluates public domains across five core dimensions: Speed (Performance), Core Web Vitals, Security Configuration, Search Engine Optimization (SEO), and Web Accessibility (WCAG compliance).

Key Diagnostic Capabilities

Core Web Vitals Checker: Real-time profiling of Google's field and lab performance metrics including Largest Contentful Paint (LCP), Interaction to Next Paint (INP), and Cumulative Layout Shift (CLS).
Technical SEO Analysis: Automated crawler audits targeting HTML tag structures, canonical declarations, sitemap presence, robots.txt routing, and content-to-code ratios.
Security Configuration Audit: Dynamic validation of SSL certificate chains, HTTP security response headers (including Content Security Policy, HTTP Strict Transport Security, and X-Frame-Options), and cookie attribute settings.
Web Accessibility Assessment: Semantic structure validation, ARIA pattern parsing, color contrast checks, and target sizing inline with Web Content Accessibility Guidelines (WCAG 2.1 AA).
White-Label Reporting: Instant generation of client-ready, comprehensive PDF export reports to facilitate audit presentations.

Frequently Asked Questions

What is The Site Vitals audit tool?

The Site Vitals is a free website performance scanner that checks Core Web Vitals, security, SEO, and accessibility metrics to provide clear, developer-friendly remediation guides.

What is the recommended title tag length for SEO?

Search engines generally recommend keeping page titles between 35 and 65 characters to ensure high visibility and prevent truncation in Search Engine Results Pages (SERPs).

How does static asset caching improve load speed?

Configuring proper cache-control headers (like 1-year max-age with the immutable flag) stores static files locally in the user's browser, eliminating redundant network roundtrips on return visits.

How can I eliminate Cumulative Layout Shift (CLS)?

Ensure that all image, media, and dynamic iframe dimensions are explicitly defined via width and height HTML attributes or CSS ratio wrappers, preventing shifts as assets finish loading.