Free Shopify Speed Test — Analyze Your Store in Seconds
See exactly what's slowing your Shopify store and how to fix it. Powered by Google PageSpeed Insights.
No signup required · Results in ~30 seconds · Works with any website
32%
more bounce at 3s load time
90%
more bounce at 5s load time
+8.4%
conversions per 0.1s faster
-1%
Amazon sales per 100ms delay
Sources: Google/SOASTA 2017, Google/Deloitte, Amazon
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⚠️ Your store's speed is costing you sales
Every 1-second delay in load time reduces conversions by up to 7%. A slow store doesn't just frustrate visitors — it hurts your Google rankings too.
📈 Google Rankings Impact
Core Web Vitals are an official Google ranking signal since June 2021.
Core Web Vitals
Issues Found
Thunder can automatically fix 0 of 0 issues
Most stores see a 20–40 point improvement after installing Thunder.
Fix These Issues Now — Install Thunder Free →Free plan available · No credit card required · 1-click install
Detailed Recommendations
Ready to speed up your Shopify store?
Install Thunder Free →Why Test Your Shopify Store Speed?
Page speed isn't just a technical metric — it directly impacts your revenue. Google has confirmed that page speed is a ranking factor, and research consistently shows that faster-loading stores convert significantly better than slow ones.
For Shopify merchants, speed is especially critical. The average Shopify store loads dozens of third-party scripts from apps like Klaviyo, Judge.me, Loox, and page builders. Each script adds weight to your page, competing for bandwidth and processing power on your customers' devices.
The Real Cost of a Slow Store
Studies from Google and Deloitte show that even a 0.1-second improvement in load time can increase conversions by 8%. On the flip side, if your store takes more than 3 seconds to load, over 50% of mobile visitors will leave before seeing a single product.
Consider these numbers: if your store gets 10,000 monthly visitors and a 1% conversion rate with a $50 average order value, a speed improvement that reduces bounce rate by just 10% could mean an extra $5,000/month in revenue — with zero additional ad spend.
What This Speed Test Measures
Our tool uses Google's PageSpeed Insights API to run a comprehensive analysis of your Shopify store, measuring the same Core Web Vitals that Google uses for search rankings:
- Largest Contentful Paint (LCP) — How quickly your main content becomes visible. Google considers under 2.5 seconds "good."
- First Contentful Paint (FCP) — When the first element renders on screen. Under 1.8 seconds is ideal.
- Cumulative Layout Shift (CLS) — How much your page layout shifts while loading. Under 0.1 is the target.
- Total Blocking Time (TBT) — How long JavaScript blocks user interaction. Under 200ms is considered good.
How to Improve Your Score
After running the test, you'll see specific recommendations tailored to your store. The most impactful changes for Shopify stores typically involve optimizing how third-party scripts load — which is exactly what Thunder automates. Rather than manually editing theme code or removing essential apps, Thunder intelligently manages script loading to minimize performance impact.
Run the test above to see your current score and discover exactly what's slowing your store down.