Web Strategy
Test your website speed
Test your website's performance, security and SEO for free in 30 seconds. Get a score, load times and the three fixes that make the biggest difference.
Kevin A. Sommerstein6 min read
Test your website’s performance: free, in 30 seconds
You know how your website feels when you open it on your office computer. Fast internet, big screen, everything loads instantly. But that’s not how your customers experience it.
Most visitors arrive on their phones, often on 4G or a weak Wi-Fi connection, where the same site takes longer to load. In Google’s own 2016 study of mobile sites, more than half of visits were abandoned if a page took longer than three seconds to load.
That means lost customers, lower search engine rankings, and fewer conversions, without you even noticing. If you want to understand why it matters so much, we’ve written more about why speed matters for your website.
That’s why we built a free tool that gives you a complete picture of how your website actually performs.
How our performance test works
You enter your web address, hit test, and within 30 seconds you get a full report. No sign-up, no account, just results.
The test runs on both mobile and desktop with Google PageSpeed, and security is checked with Mozilla Observatory. Each result gets its own link that you can copy and share.
What the report shows
Overall grade (A-F)
The first thing you see is an overall grade from A to F, based on the average of four categories. The grade applies to the mobile version, since that is what Google goes by. If the mobile test can’t run, the grade applies to the desktop version.
Four Categories
The report scores your site across four areas, each on a scale from 0 to 100:
- Performance: how fast the site loads. This is what most people think of when they talk about speed. It measures everything from when the first content appears to when the page is fully interactive.
- Accessibility: whether the site works for all visitors, including those using screen readers or navigating with a keyboard. Important both ethically and for SEO.
- Best Practices: technical hygiene. Does the site use HTTPS? Are there console errors? Are modern image formats being used? Things that are often overlooked but affect both security and user experience.
- SEO: whether the site has the technical foundations for search engines to understand and rank it. Meta tags, heading structure, mobile-friendliness, and more. Our SEO checklist for new websites covers the basics.
Detailed performance metrics
Below the scores, you’ll find specific metrics showing exactly where the time goes:
- First Contentful Paint: when the visitor first sees something on screen. Under 1.8 seconds is good.
- Largest Contentful Paint: when the main content (hero image, headline) is fully visible. Under 2.5 seconds is good.
- Time to Interactive: when the page actually responds to clicks and input. Under 3.8 seconds is good.
- Layout Stability: whether elements jump around while the page loads. 0 is perfect, under 0.1 is good.
Keep in mind that this is a lab measurement, a test that runs once from Google’s servers. Real visitors may experience the site a little differently depending on their phone and connection.
Security analysis
Beyond performance, we check your site’s security settings with Mozilla Observatory: things like HTTPS, which scripts the page is allowed to load and how cookies are protected.
You get a security grade and can see how many tests passed versus failed. Most websites have room for improvement here: these are things that are often forgotten during web development but protect both you and your visitors.
Your three biggest improvements
Near the top of the report you’ll find the three fixes that save the most load time on mobile. For each one, you see what the issue is, why it matters and what fixing it involves. The rest of the suggestions are listed further down under More improvements.
This is where the test goes from interesting to useful: you don’t just get numbers, you get a roadmap for what needs to be done.
Get the report sent to you
Once the test is done, you can get the results and the list of fixes by email, so you can save them or share them with a colleague. You can also ask us to test the site again in 30 days and email you the new result.
It’s completely optional. The results show on screen either way.
Why we built this
At Developly, we work with web development every day, and we kept running into the same problem: business owners didn’t know their website had performance issues until it was already costing them customers and search rankings.
Using Google’s own developer tools requires technical knowledge. Interpreting raw Lighthouse data isn’t intuitive. We wanted to make it easy for anyone to get a clear picture of their site’s health, without needing to be a developer.
The result is a tool that combines performance analysis and security checks in a single report, with clear explanations instead of technical jargon.
Test your site now
Head over to our performance test, enter your web address, and see how your site actually performs. It takes 30 seconds and costs nothing.
If the results show room for improvement, we’re happy to help. Contact us for a free walkthrough of what can be done to make your site perform better, rank higher, and convert more.
Frequently asked questions
Yes, the test is completely free and you can run it as many times as you like. You do not have to pay or hand over any details to see the result.
No. You just enter your web address and run the test. If you want the report by email, you can enter your address once the test is done, but it is not required to see the results.
The test measures your site with Google PageSpeed, the tool Google offers for measuring websites, and checks security with Mozilla Observatory. It is a lab measurement, a test that runs when you press the button, not statistics from your visitors.
An overall grade of A or B means the site is in good shape. On the detailed metrics, the rules of thumb are under 1.8 seconds for first contentful paint, under 2.5 seconds for largest contentful paint, and layout stability under 0.1.
Start with the three biggest improvements in the report, since they save the most load time. If you want help fixing them, you are welcome to contact us for a walkthrough.
