Free website speed test: page speed and Core Web Vitals, explained
The speed test loads your homepage three times on a simulated mid-range phone with a mobile connection and keeps the middle result. Then it checks up to 25 pages for what usually makes a site slow: oversized images, heavy pages, files that hold up the first view, and missing compression or caching.
- No signup
- Up to 25 pages
- Results in 2–5 minutes
- PDF report included
What the website speed test checks
Page speed checks from the website audit. The free test covers your homepage on mobile; the Professional audit tests up to 5 pages on mobile and desktop.
Page speed
10 free10 Professional
A lab speed test on a simulated phone and mobile connection: Largest Contentful Paint, Cumulative Layout Shift and Total Blocking Time, plus oversized images, page weight, compression, caching and files that hold up the first view.
See every check (20)
- Largest Contentful Paint (lab)
- Cumulative Layout Shift (lab)
- Total Blocking Time (lab)
- Lighthouse performance score (lab)
- Page download size
- Images are sized for how they're shown
- Main image loads early
- No files hold up the first view
- Text files are compressed
- Browsers can cache site files
- First Contentful Paint (lab)Professional
- Server response time (lab)Professional
- Images use efficient formatsProfessional
- Images below the fold load laterProfessional
- Little unused JavaScriptProfessional
- Little unused CSSProfessional
- Third-party scripts are lightProfessional
- No long pauses while loadingProfessional
- Fonts don't delay textProfessional
- Number of requests per pageProfessional
How to read your page speed results
Largest Contentful Paint (LCP) is how long the main content takes to appear: under 2.5 seconds is good. Cumulative Layout Shift (CLS) measures how much the page jumps while it loads: under 0.1 is good. Total Blocking Time (TBT) is how long the page is too busy to respond to a tap: under 200 milliseconds is good.
These are lab results: a controlled test you can repeat. The Core Web Vitals in Google Search Console come from real Chrome users and include Interaction to Next Paint, which a lab test can't measure. Use the lab results to find causes, and field data to confirm that a fix helped.
Results vary a little from run to run, because networks and servers do. That's why the test runs three times and keeps the middle result instead of the best one.
What usually makes a website slow, and how to fix it
A slow small-business site is usually slow for one or two reasons. The speed findings name the files involved.
01
Oversized images
An image uploaded straight from a camera or stock library can be 4000 pixels wide and several megabytes, then shown at 400. Resize images to the largest size they're displayed at and use WebP or AVIF.
02
A main image that loads late
If the large image at the top of the page loads late, LCP suffers. Don't lazy-load it, and make sure it isn't waiting on a slider script.
03
Files that hold up the first view
Stylesheets and scripts in the page head must download before anything appears. Defer scripts the first screen doesn't need.
04
Content that jumps while loading
Images without a width and height, late fonts and banners that push content down make the page jump. Reserve space for them.
05
No compression or caching
Text files sent without compression, and files browsers aren't allowed to cache, make every visit download everything again. It's usually one server or CDN setting.
Check every page with the Professional audit
Up to 150 pages, all 139 checks, speed tests on 5 pages, a roadmap grouped by cause and a report that never expires. $99 one-time, or $79 when you upgrade from a free report within 48 hours.
Website speed test FAQ
Is the website speed test free?
Yes, with no signup. The free audit includes a lab speed test of your homepage on mobile and speed checks across up to 25 pages.
Is this the same as Google PageSpeed Insights?
The lab test uses the same engine, Lighthouse. PageSpeed Insights tests one page at a time; this audit adds image, compression and caching checks across up to 25 pages, plus SEO, accessibility and security checks in the same report.
Why is my mobile result worse than on my computer?
The test simulates a mid-range phone on a mobile connection, with far less processing power and bandwidth than a desktop. Most visitors to small-business sites use phones, so mobile is the result that matters most.
What's a good page speed?
On mobile: Largest Contentful Paint under 2.5 seconds, Cumulative Layout Shift under 0.1 and Total Blocking Time under 200 milliseconds.
Does page speed affect SEO?
Google uses page experience, including Core Web Vitals from real users, as one of many ranking signals. A faster site mainly helps visitors stay and get in touch; any ranking benefit comes on top.
Can I test pages other than the homepage?
The Professional audit runs speed tests on up to 5 pages, on both mobile and desktop.
More free website checks
- Free website audit
All 72 free checks in one report: SEO, speed, accessibility, security and local SEO.
- Free SEO checker
Broken links, indexing, titles, sitemaps and structured data.
- Free accessibility checker
Alt text, labels, contrast, zoom and tap targets in a real browser.
- Free local SEO checker
NAP consistency, LocalBusiness schema and contact paths.
Run the free check
Same free audit, no signup. Usually 2–5 minutes.