This website speed test runs Google's PageSpeed Insights on any URL, on a simulated phone and a desktop, and gives each a performance score out of 100. Under each score you get five load timings, from First Contentful Paint to Cumulative Layout Shift, and the biggest fixes with the time each one saves. It is free and needs no signup.
How to use the website speed test
- 1Type the full address of the page you want to test, such as https://example.com/pricing. Test the page people land on first, such as your top blog post or a service page.
- 2Press Check. The test takes up to a minute, because Google loads the page twice, once as a phone and once as a desktop.
- 3Read the two scores: 90 and above is good, 50 to 89 needs work, below 50 is poor.
- 4Read the five timings under each score, then Top opportunities for the fixes worth doing first.
- 5Fix one thing, then test again. Scores move a few points between runs, so compare more than one run before you decide.
When to use it
- Your site feels slow on your phone and you want to know why.
- You added a plugin, a chat widget or a new hero video and want to see what it cost.
- You are choosing between two themes or two hosts and want numbers to compare.
- Search Console lists slow pages and you want to see what is slowing one of them down.
Worked example
A marketing homepage on phone and desktop
We tested our own homepage.
- URL to check
- https://searchblueprint.io
- Mobile
- 77
- Desktop
- 95
- Largest Contentful Paint
- 4.2 s on mobile, 0.9 s on desktop
- Total Blocking Time
- 70 ms on mobile, 130 ms on desktop
- Cumulative Layout Shift
- 0.123 on mobile, 0.036 on desktop
- Top opportunities
- Reduce unused JavaScript, ~0.75s on mobile
Desktop is fine at 95. The phone score of 77 comes mostly from the largest element taking 4.2 seconds to appear and a layout shift of 0.123, just over Google's 0.1 line. The one listed fix, cutting unused JavaScript, saves about three quarters of a second on a phone, so it is the first job.
What the five timings mean
| Timing | What it measures |
|---|---|
| First Contentful Paint | When the first text or image appears |
| Speed Index | How quickly the visible page fills in |
| Largest Contentful Paint | When the biggest element on screen, usually the hero image or heading, finishes loading |
| Total Blocking Time | How long scripts block the page from responding while it loads |
| Cumulative Layout Shift | How much the layout jumps around as things load |
These are lab timings from one simulated visit. Google's Core Web Vitals report in Search Console uses real visitors over 28 days, so the two can disagree.
Made by SearchBlueprint
This test is free with no signup. SearchBlueprint, who make it, sell SEO planning: a plan that shows the searches each of your pages should answer and who ranks for them now.
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