API Reference
How PageSpeed Insights uses Google's official API
Powered by Google
PageSpeed Insights uses the official Google PageSpeed Insights API to analyze websites. This means you get the same data and recommendations that Google uses.
We believe in transparency – all the data you see comes directly from Google with no modifications.
What is the PageSpeed Insights API?
The PageSpeed Insights API is Google's official tool for measuring web performance. It combines data from real Chrome users (Field Data) with controlled lab tests (Lighthouse) to give you a complete picture of your site's speed.
The API runs the same checks that Google uses when evaluating sites for search rankings, making it an essential tool for SEO.
Official Documentation
For developers who want to dig deeper, here are links to Google's official resources:
How We Use the API
Our tool makes it easy to use the PageSpeed Insights API without any technical setup:
- Enter a URL and we call the API on your behalf
- Results are displayed in a friendly, easy-to-understand format
- We highlight issues that edge caching can help solve
- Reports can be downloaded as PDFs for sharing
We don't store or track the URLs you analyze beyond your browser session.
Data Accuracy
The data you see here is identical to what you'd get from Google's own PageSpeed Insights tool or by calling the API directly.
Results may vary slightly between tests due to network conditions and server response times. For the most accurate picture, run multiple tests.
Rate Limits
Google's API has usage limits to ensure fair access for everyone. If you're testing many pages, you may occasionally need to wait between analyses.
Tip: Our caching feature helps avoid unnecessary API calls by storing recent results.
See it in action
Try analyzing your website now and see the API results for yourself.
Analyze Your Site