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PAGESPEED INSIGHTS

PageSpeed Insights

Run Lighthouse-powered performance audits directly from the side panel

What is PageSpeed Insights?

PageSpeed Insights integration brings Google's Lighthouse auditing directly into your development workflow. Analyze page performance, accessibility, SEO, and best practices without leaving your browser's side panel.

Performance Score
Measure load times and Core Web Vitals
Accessibility
WCAG compliance and a11y audits
Best Practices
Security, HTTPS, and modern standards
SEO
Search engine optimization checks

How to Use

Run an Audit

  1. 1.Open Developer's Toolkit side panel and navigate to PageSpeed Insights
  2. 2.Enter a URL or click Use Current Page
  3. 3.Select strategy: Mobile or Desktop
  4. 4.Click Analyze URL and wait for results

Understanding Results

PageSpeed Insights provides scores in four categories, each rated 0-100:

90-100
Good - No action needed
50-89
Needs Improvement
0-49
Poor - Immediate attention required

Core Web Vitals

PageSpeed Insights measures Google's Core Web Vitals, which are essential metrics for user experience:

LCP

Largest Contentful Paint

Measures loading performance. Should occur within 2.5s of page start.

FID

First Input Delay

Measures interactivity. Pages should have FID of 100ms or less.

CLS

Cumulative Layout Shift

Measures visual stability. Should maintain CLS of 0.1 or less.

Rate Limiting & API Key

Without an API key, PageSpeed Insights may return 429 rate limit errors after a few requests. To avoid this:

  1. 1.Get a free API key from Google Cloud Console
  2. 2.Navigate to Settings in Developer's Toolkit
  3. 3.Enter your PageSpeed Insights API Key
  4. 4.Save - You now have unlimited audits!

Common Use Cases

Development & Testing

Run audits during development to catch performance issues early. Test mobile and desktop separately.

Pre-Deployment Checks

Verify performance, accessibility, and SEO scores before pushing to production.

Competitive Analysis

Audit competitor websites to benchmark performance and identify optimization opportunities.

Core Web Vitals Monitoring

Track Core Web Vitals to ensure your site meets Google's ranking criteria.

Pro Tips

  • Test both mobile and desktop - mobile performance is weighted more heavily for Google rankings
  • Focus on Core Web Vitals (LCP, FID, CLS) as these directly impact SEO
  • Run multiple audits to get consistent results - scores can vary slightly
  • Address "Opportunities" section first for biggest performance gains
  • Use the side panel integration to audit pages while developing