Who is it for?
- Useful for seeing why one page is slow and which fixes are suggested, from a single address.
- Useful for understanding why real-user data and a lab measurement can disagree.
PageSpeed Insights — Website Speed and Accessibility Test
PageSpeed Insights analyzes a page address for mobile and desktop and shows real-user field data together with Lighthouse lab data.
Why it fits
| Good to know | Website |
|---|---|
| Free output | — |
| No account needed | — |
| No watermark | — |
| Works offline | — |
| Batch processing | — |
| Content language | — |
— Unverified conditions. Official documentation reviewed. The app itself has not been hands-on tested. Matches only documented content-language support, not interface language.
Sources and review date2
Founder feedback and correction
Editorial selection guide
Last checked:
Getting started
- Enter the public address of the page you want to measure on the official site and press Analyze.
- Read the mobile and desktop results separately; weigh field data, when present, before the lab results.
- Fix the item that looks most impactful in the suggestions, then analyze the same address again and compare.
Decision points
- Field data reflects real visitors over a trailing 28-day window; lab data is a simulation on one device and fixed network conditions. Read the two separately when you decide.
- The accessibility and SEO sections are automated Lighthouse checks; complete them with a dedicated accessibility tool for a detailed review.
Limits
- Field data needs a publicly crawlable page with enough real-user samples; new or low-traffic pages may show origin-level data or none at all.
- A score depends on its measurement conditions; OOXL did not run this tool or measure results, so do not treat one score as a lasting result or a ranking promise.
Frequently asked questions
Is Lighthouse the same as PageSpeed Insights?
According to the official documentation, PageSpeed Insights runs its lab analysis with Lighthouse, so Lighthouse is not listed as a separate product. PageSpeed Insights adds Chrome User Experience Report field data on top.
Why is there no field data for my newly published page?
The documentation says field data needs enough real-user samples; new or low-traffic pages fall back to origin-level data or show none.