Free Google Page Speed Insights Tool
Find out how long it takes for your page to load and discover the reasons why. For this service, we utilize the 'Google PageSpeed Insights API'; additionally, we provide server-side analysis along with suggestions (explained in simple, accessible language) to help you resolve any issues. Simply enter the URL you wish to analyze, select either 'Mobile' or 'Desktop', and get your results in less than 60 seconds.
This service uses the 'Google PageSpeed Insights API'. GIMSEO is an independent SEO toolset and is not affiliated with Google LLC.
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How to Use the PageSpeed Insights Tool
- Enter the full URL of the page you want to test.
- Choose Mobile or Desktop.
- Click Check speed. Google runs a full Lighthouse test, which can take up to a minute.
- Review your score, your Core Web Vitals, and the list of improvements, starting with the items marked Fix first.
How Our PageSpeed Insights Checker Works
Each test sends your URL to the PageSpeed Insights API, the same engine behind Google's public PageSpeed Insights tool. The results come back in two parts: lab data and field data.
Lab data comes from a Lighthouse audit that loads your page in a simulated browser on an emulated connection and calculates your performance score. Field data shows how real Chrome users experienced the page over the past 28 days, and it appears only for pages with enough traffic.
- LabLighthouse test in a simulated browser
- Field28 days of real Chrome user data
- 60 sResults in under a minute
What GIMSEO adds to Google's report
Google's own page doesn't bring all of this together in one place. Every GIMSEO test also includes:
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Page screenshots
A screenshot of your page on a phone or desktop screen, plus a filmstrip that shows how it loads.
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Server metrics
Your server response time (TTFB), HTML size, and HTTP compression.
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Rendering checks
Render-blocking scripts, images without set dimensions, and images that are not lazy-loaded.
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Prioritized fixes
A ranked list of improvements that names the files behind each issue and the time you could save.
Mobile and desktop page speed tests
Run both tests. Each one shows how your page performs under different conditions, and both include a screenshot and a filmstrip of the load process.
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Mobile test
Simulates a mid-range phone on a slower network, the same approach Google uses to evaluate most sites. Expect a lower score here than on desktop.
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Desktop test
Uses a larger viewport and a fast connection. It shows how the page performs for visitors on laptops and desktop computers.
Google PageSpeed score breakdown
Google rates your performance score on three levels.
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0-49
Poor
The page is slow. Large images, heavy scripts, or a slow server are the usual causes.
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50-89
Needs improvement
Visitors may notice delays. Work through the Fix first items.
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90-100
Good
Your page loads quickly. Recheck it after major updates.
Core Web Vitals explained
These metrics measure loading speed, responsiveness, and visual stability. Each card shows Google's target for a good result.
- LCPGood: 2.5 s or less
Check Largest Contentful Paint (LCP)
LCP measures how long the largest element on screen, usually a hero image or headline, takes to appear. Our tool names the exact element being measured.
- INPGood: Under 200 ms
Interaction to Next Paint (INP) test
INP measures how quickly your page responds to taps and clicks. It comes from real-user field data, so it appears only when Google has enough Chrome visits for your page.
- CLSGood: 0.1 or lower
Cumulative Layout Shift (CLS) checker
CLS measures how much the layout shifts while the page loads. Images without dimensions, late-loading ads, and cookie banners are common causes.
- FCPGood: Under 1.8 s
First Contentful Paint (FCP) and TTFB
FCP marks the moment the first text or image appears. TTFB shows how quickly your server starts responding; aim for under 800 milliseconds.
How to improve page loading speed
Start with these fixes. Together they solve most slow-page problems.
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Compress your images
Serve them in WebP or AVIF format.
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Defer non-critical scripts
Add the defer attribute to scripts that do not need to run right away.
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Remove what you do not use
Uninstall unnecessary plugins, tracking codes, and fonts.
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Cache and use a CDN
Turn on page caching and serve files through a content delivery network.
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Set image dimensions
Add width and height to every image to prevent layout shifts.
Frequently asked questions
What is the Google PageSpeed Insights tool, and how do I use it?
It is a free speed test powered by Google's PageSpeed Insights API. Enter your page URL, choose Mobile or Desktop, and click Check speed. You'll see your performance score, your Core Web Vitals, and suggested improvements. No sign-up is required.
What is a good PageSpeed Insights score?
A score of 90 or higher is good, 50 to 89 needs improvement, and below 50 is poor. Treat the score as a guide, since real-world performance is measured by your Core Web Vitals.
Why is my mobile page speed score lower than desktop?
The mobile test simulates a slower processor and network connection, so heavy scripts and large images take longer to load. Mobile scores are often 20 to 30 points lower than desktop scores.
How can I fix a low page speed score?
Start with the items marked Fix first in your report. They offer the largest performance gains and name the specific files involved. Smaller images, fewer render-blocking files, and a faster server response usually bring quick, measurable improvements.
Does this tool use the PageSpeed Insights API?
Yes. Every test runs through the official Google PageSpeed Insights API. Results are cached for one hour, so testing the same page again within that hour returns the saved result.
Is this Core Web Vitals checker free?
Yes. The tool is free to use, and you do not need an account.
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