Free Page Speed Test
Analyze a public website with Google PageSpeed Insights and compare mobile and desktop Lighthouse diagnostics.
Website Performance Analyzer
Enter a public website URL to review mobile and desktop Lighthouse performance diagnostics and optimization opportunities from Google PageSpeed Insights.
How to use this tool
Follow these steps to get observations you can interpret and act on.
Enter a public page URL
Use the specific HTTP or HTTPS page you want to analyze. The page must be accessible to the analysis service.
Wait for both analyses
Start the test and allow the mobile and desktop requests to finish. Switch device tabs to inspect each set of returned results.
Prioritize measured opportunities
Read the listed diagnostics and potential savings, make a focused improvement, then rerun under comparable conditions. Export the report if useful.
How the page speed test works
Your public URL is submitted through this site’s PageSpeed API proxy. Google PageSpeed Insights returns Lighthouse audit data for mobile and desktop strategies. The page presents the returned category scores, timing metrics, screenshots and available optimization opportunities.
Understanding your results
- Lighthouse is a lab analysis with a particular device and network strategy. Its result can differ from visits by real users.
- The displayed lab metrics do not replace real-user Core Web Vitals data or establish that a page passes every search-engine requirement.
- Scores and timings can vary across runs because of network conditions, server responses and third-party resources. Review repeated observations rather than one score alone.
Privacy & important limitations
- The entered URL is forwarded to Google PageSpeed Insights. Use public URLs without credentials, access tokens or private query data.
- Provider quota, authentication restrictions or a target-site error can prevent analysis. The tool reports that error instead of substituting simulated scores.
Read the returned audit scope and metric descriptions. Lighthouse lab data should not be presented as a direct measurement of every visitor’s experience.
Frequently asked questions
Does a high score guarantee better search rankings?
No. A Lighthouse score is a diagnostic signal, not a ranking guarantee. Content, accessibility, crawlability and real-user experience need their own review.
Why are mobile and desktop results different?
The provider uses different device strategies. Compare the same strategy before and after a change and read its metric details alongside the score.