Google PageSpeed Insights

Page speed scores, Core Web Vitals and SEO scores

Check web page speed and quality on mobile and desktop.

Check page speed

Check page speed

Test a web page for speed, accessibility, best practices and SEO on mobile or desktop. Real-user data and savings estimates appear only when available; tests may take up to 60 seconds.

Your information

Page URL

Address of the page to test, such as example.com.

More options

DeviceOptional

Device type, such as mobile.

1 credit per run

Example results

Device

mobile

Seo Score

Report Link

pagespeed.web.dev

Tested Link

example.com

Performance Score

100

Accessibility Score

Best Practices Score

100

Lab Results

Speed Index (seconds): 0.783
Total Blocking Time (ms): 0
First Contentful Paint (seconds): 0.783
Largest Contentful Paint (seconds): 0.783

Suggested Fixes

Suggested Fixes
Fix	Estimated Saving
Use efficient cache lifetimes	Est savings of 2 KiB
Network dependency tree	—

Real User Results

Scope: URL
Passed: Yes
Cumulative Layout Shift: 0
Interaction to Next Paint (ms): 80
Largest Contentful Paint (seconds): 0.941

Example data · Run in Studio for fresh results.

About Google PageSpeed Insights

Google PageSpeed Insights, also called Google PSI, tests web pages for speed, accessibility, best practices and SEO on mobile or desktop.

Built by Fous from pagespeed.web.dev and checked automatically; it last passed a check on Sep 30, 2026. Fous is not affiliated with Google PageSpeed Insights.

Actions

Check page speed

1 credit per run

Test a web page for speed, accessibility, best practices and SEO on mobile or desktop. Real-user data and savings estimates appear only when available; tests may take up to 60 seconds.

What you provide

Field	Type	Required	Description
Device`device`	Text	Optional	Device type, such as mobile.Example: Desktop
Page URL`page_url`	Text	Required	Address of the page to test, such as example.com.Example: example.com

What you get

Field	Type	Description
Device`device`	Text	Device type tested.Example: Mobile
Seo Score`seo_score`	Number	SEO score out of 100.Example: 80
Lab Results`lab_results`	Details	Results measured by Lighthouse.
Speed Index (seconds)`lab_results.speed_index_seconds`	Number	Lab speed index in seconds.Example: 0.783
Total Blocking Time (ms)`lab_results.total_blocking_time_ms`	Number	Lab total blocking time in milliseconds.Example: 0
First Contentful Paint (seconds)`lab_results.first_contentful_paint_seconds`	Number	Lab first contentful paint in seconds.Example: 0.783
Largest Contentful Paint (seconds)`lab_results.largest_contentful_paint_seconds`	Number	Lab largest contentful paint in seconds.Example: 0.783
Report Link`report_link`	Text	Link to the full PageSpeed Insights report.Example: https://pagespeed.web.dev/analysis/https-example-com/eu9v402hfw?form_factor=mob…
Tested Link`tested_link`	Text	Final page address tested.Example: https://example.com/
Suggested Fixes`suggested_fixes`	List	Up to five relevant suggested fixes.
Fix`suggested_fixes[].fix`	Text	Suggested improvement.Example: Use efficient cache lifetimes
Estimated Saving`suggested_fixes[].estimated_saving`	Text	Estimated saving shown by PageSpeed, if any.Example: Est savings of 2 KiB
Performance Score`performance_score`	Number	Performance score out of 100.Example: 100
Real User Results`real_user_results`	Details	Real-user experience when available.
Scope`real_user_results.scope`	Text	Whether data describes the URL or its origin.Example: URL
Passed`real_user_results.passed`	Yes or no	Whether Core Web Vitals passed.Example: Yes
Cumulative Layout Shift`real_user_results.cumulative_layout_shift`	Number	Real-user cumulative layout shift.Example: 0
Interaction to Next Paint (ms)`real_user_results.interaction_to_next_paint_ms`	Number	Real-user interaction to next paint in milliseconds.Example: 80
Largest Contentful Paint (seconds)`real_user_results.largest_contentful_paint_seconds`	Number	Real-user largest contentful paint in seconds.Example: 0.941
Accessibility Score`accessibility_score`	Number	Accessibility score out of 100.Example: 96
Best Practices Score`best_practices_score`	Number	Best practices score out of 100.Example: 100

Example result

For Page URL: example.com

JSON

{
  "device": "mobile",
  "seo_score": 80,
  "lab_results": {
    "speed_index_seconds": 0.783,
    "total_blocking_time_ms": 0,
    "first_contentful_paint_seconds": 0.783,
    "largest_contentful_paint_seconds": 0.783
  },
  "report_link": "https://pagespeed.web.dev/analysis/https-example-com/eu9v402hfw?form_factor=mobile",
  "tested_link": "https://example.com/",
  "suggested_fixes": [
    {
      "fix": "Use efficient cache lifetimes",
      "estimated_saving": "Est savings of 2 KiB"
    },
    {
      "fix": "Network dependency tree",
      "estimated_saving": null
    }
  ],
  "performance_score": 100,
  "real_user_results": {
    "scope": "URL",
    "passed": true,
    "cumulative_layout_shift": 0,
    "interaction_to_next_paint_ms": 80,
    "largest_contentful_paint_seconds": 0.941
  },
  "accessibility_score": 96,
  "best_practices_score": 100
}

For developers

Run this workflow from your own code. In Studio, turn on Developer mode and create an API key.

cURL

# First set your key: export FOUS_API_KEY='YOUR_FOUS_API_KEY'
: "${FOUS_API_KEY:?Set FOUS_API_KEY before running this example}"

curl 'https://api.fous.com/v1/query' \
  --fail-with-body --silent --show-error --max-time 120 \
  -H "Authorization: Bearer $FOUS_API_KEY" \
  -H 'Content-Type: application/json' \
  --data-raw '{
  "api": "@google-pagespeed-insights",
  "visibility": "public",
  "operation": "check_page_speed",
  "version": 1,
  "input": {
    "page_url": "example.com"
  },
  "response": {
    "format": "json"
  }
}'

What you can do with it

Compare page speed scores on mobile and desktop.
Review accessibility and best practices scores for a web page.
Check whether real-user Core Web Vitals passed when data is available.
Prioritize page improvements using suggested fixes and estimated savings.
Check a page’s SEO score.

Questions

Is Fous affiliated with Google PageSpeed Insights?

No. Fous is not affiliated with Google PageSpeed Insights. This workflow reads the public pagespeed.web.dev website and returns its data.

How much does it cost?

Each run costs 1 credit. With pay-as-you-go, a credit costs 1¢; monthly plans cost less per credit.

Do I need a Google PageSpeed Insights account?

No. You only need a Fous account.

How current is the data?

Fous gets the data from pagespeed.web.dev when you run it; repeating the same request within a day may return the saved result. Fous checks this workflow automatically; it last passed a check on Sep 30, 2026.