Lighthouse Performance Auditor
Run a Google PageSpeed Insights audit for performance, accessibility, SEO, and best-practice checks, then review the returned metrics and recommendations.
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Start Performance Audit
Enter a public URL and select the audit categories and device profile
How to Use Lighthouse Performance Auditor
- 1
Enter Website URL
Input the complete URL of the website you want to audit. Make sure to include the protocol (https://) for accurate results and proper analysis.
Tip:Test your most important pages first - homepage, key landing pages, and conversion-critical pages for maximum impact. - 2
Configure Audit Settings
Choose mobile or desktop and select the audit categories to include.
Tip:Start with the device profile that matches the audience you are investigating. - 3
Start Lighthouse Audit
Click 'Run Audit' to request the selected PageSpeed Insights categories. The request can take 30–60 seconds.
Tip:The audit simulates a mobile device on a slower connection to provide realistic performance metrics that match real user experiences. - 4
Review Scores & Implement Fixes
Examine the four main categories with detailed scores, Core Web Vitals metrics, and specific optimization recommendations for improvement.
Tip:Focus on scores below 90 first. Green (90+) is good, orange (50-89) needs improvement, red (0-49) requires immediate attention.
Features & Benefits
Performance Metrics
Reports the performance metrics returned by PageSpeed Insights, together with available diagnostics and recommendations.
Multi-Category Auditing
Evaluate Performance, Accessibility, SEO, Best Practices, and PWA compliance with detailed scoring and actionable improvement suggestions.
Mobile & Desktop Testing
Test your website on both mobile and desktop devices with realistic network conditions and device capabilities for accurate results.
Actionable Recommendations
Get specific, prioritized recommendations with estimated impact and savings to guide your optimization efforts effectively.
Real User Experience Metrics
Analyze metrics that reflect real user experiences including First Contentful Paint, Speed Index, and Total Blocking Time measurements.
SEO & Accessibility Insights
Identify SEO issues, accessibility problems, and compliance gaps with detailed explanations and step-by-step improvement guides.
Frequently Asked Questions
What are Core Web Vitals and why do they matter?
Core Web Vitals are three key metrics Google uses to measure user experience: LCP (loading speed), FID (interactivity), and CLS (visual stability). They directly impact search rankings and user satisfaction.
How often should I run Lighthouse audits?
Run audits after major changes, monthly for active sites, or weekly for sites under development. Regular monitoring helps track performance trends and catch issues early.
Why do Lighthouse scores vary between runs?
Scores can vary due to network conditions, server load, third-party resources, and caching. Run multiple audits and look for consistent patterns rather than single scores.
Do Lighthouse scores directly affect SEO rankings?
Yes! Google uses Core Web Vitals as ranking factors. Better Lighthouse scores often correlate with improved search rankings, user experience, and conversion rates.
Can I audit password-protected or private pages?
This tool only audits publicly accessible pages. For protected pages, use Google's PageSpeed Insights, run Lighthouse locally, or use authenticated testing tools.
What's the difference between mobile and desktop audits?
Mobile audits simulate slower connections and mobile devices, while desktop audits use faster connections. Google prioritizes mobile performance, so start with mobile audits.
Technical Specifications
Use Cases & Applications
E-commerce Performance Optimization
Audit your online store to improve loading speeds, reduce bounce rates, and increase conversion rates through better Core Web Vitals performance.
SEO & Search Ranking Improvement
Analyze SEO factors like meta tags, structured data, and mobile-friendliness to improve search engine rankings and organic visibility.
Accessibility Compliance Audit
Ensure your website meets accessibility standards and provides an inclusive experience for users with disabilities and assistive technologies.
Core Web Vitals Monitoring
Track and optimize Core Web Vitals metrics that directly impact Google search rankings and user experience quality scores.
Development Quality Assurance
Validate web development best practices, security measures, and modern web standards during the development and testing process.
Client Reporting & Analysis
Review audit metrics and recommendations with clients, stakeholders, or the engineering team.