Use Google PageSpeed Insights to analyze a public URL with Lighthouse. Choose desktop or mobile strategy and a locale, then retrieve performance, accessibility, SEO, and best-practice results. Performance metrics include First Contentful Paint, Largest Contentful Paint, and Speed Index.
Pass scores and diagnostics into reporting or alerting steps. An automated accessibility audit identifies some issues; it does not establish complete accessibility conformance.
Create an API key
- Open the Google Cloud Console and create or select a project.
- Enable the PageSpeed Insights API in the API Library.
- Open Credentials and create an API key.
- Paste the key into the Sim block.
See Google's PageSpeed API setup for project and authentication requirements.
Use the block
Analyze web pages for performance, accessibility, SEO, and best practices using Google PageSpeed Insights API powered by Lighthouse.
Actions
Google PageSpeed Analyze
Analyze a webpage for performance, accessibility, SEO, and best practices using Google PageSpeed Insights.
Inputs and outputs
Input
| Parameter | Type | Required | Description |
|---|---|---|---|
apiKey | string | Yes | Google PageSpeed Insights API Key |
url | string | Yes | The URL of the webpage to analyze |
category | string | No | Lighthouse categories to analyze (comma-separated): performance, accessibility, best-practices, seo |
strategy | string | No | Analysis strategy: desktop or mobile |
locale | string | No | Locale for results (e.g., en, fr, de) |
Output
| Parameter | Type | Description |
|---|---|---|
finalUrl | string | The final URL after redirects |
performanceScore | number | Performance category score (0-1) |
accessibilityScore | number | Accessibility category score (0-1) |
bestPracticesScore | number | Best Practices category score (0-1) |
seoScore | number | SEO category score (0-1) |
firstContentfulPaint | string | Time to First Contentful Paint (display value) |
firstContentfulPaintMs | number | Time to First Contentful Paint in milliseconds |
largestContentfulPaint | string | Time to Largest Contentful Paint (display value) |
largestContentfulPaintMs | number | Time to Largest Contentful Paint in milliseconds |
totalBlockingTime | string | Total Blocking Time (display value) |
totalBlockingTimeMs | number | Total Blocking Time in milliseconds |
cumulativeLayoutShift | string | Cumulative Layout Shift (display value) |
cumulativeLayoutShiftValue | number | Cumulative Layout Shift numeric value |
speedIndex | string | Speed Index (display value) |
speedIndexMs | number | Speed Index in milliseconds |
interactive | string | Time to Interactive (display value) |
interactiveMs | number | Time to Interactive in milliseconds |
overallCategory | string | Overall loading experience category (FAST, AVERAGE, SLOW, or NONE) |
analysisTimestamp | string | UTC timestamp of the analysis |
lighthouseVersion | string | Version of Lighthouse used for the analysis |