Is My Store Fast? Find Out in 30 Seconds
Slow stores lose customers. Test your ecommerce store speed for free - get Core Web Vitals scores, find what's slowing you down, and see how much revenue you're leaving on the table. Works with Shopify, WooCommerce, and any platform.
What We Measure
Core Web Vitals
LCP, CLS, FCP, and TTFB - the metrics Google uses to rank your store and that directly impact your conversion rate.
Third-Party Impact
Every app, widget, and script on your store identified and measured. Find exactly which ones are costing you speed and sales.
SEO & Performance
Meta tags, structured data, image optimisation, font loading, render-blocking resources, and mobile responsiveness.
Why Store Speed Matters for Revenue
Store speed isn't a vanity metric - it's a revenue metric. Research consistently shows that faster ecommerce stores convert better, and the impact is substantial:
- •8.4% more conversions from a 0.1-second improvement in load speed (Deloitte/Google, 2024)
- •53% of mobile visitors leave if a site takes over 3 seconds to load (Google)
- •Core Web Vitals affect search rankings, reducing organic traffic to slow stores
- •2x more sensitive on mobile - the same delay costs more conversions on mobile than desktop
For a store doing £50K/month, improving load time from 4 seconds to 2 seconds could mean £5K-10K in additional monthly revenue - without spending a penny more on advertising.
Understanding Your Speed Score
Platform-Specific Speed Tests
Shopify Speed Test
Find which Shopify apps are slowing your store and get platform-specific fixes.
WooCommerce Audit
Identify hosting bottlenecks, plugin bloat, and caching issues on WooCommerce.
Ecommerce SEO Checker
Full speed and SEO audit for any ecommerce platform.
AI Shopping Readiness
Check if AI shopping assistants can find and recommend your products.
Related Reading
Frequently Asked Questions
Is my store fast enough?
A fast ecommerce store loads in under 3 seconds, with a Largest Contentful Paint (LCP) under 2.5 seconds and a Cumulative Layout Shift (CLS) under 0.1. If your PageDiag score is 80+, your store is fast. Below 50 means you're likely losing customers to slow load times. Enter your URL above to find out exactly where you stand.
How do I test my store speed?
Enter your store URL in the scanner above and click "Scan". PageDiag loads your page in a real Chromium browser and measures Core Web Vitals (LCP, CLS, FCP, TTFB), JavaScript payload, third-party script impact, and SEO factors. You'll get a detailed report with scores and actionable fixes in under 60 seconds.
Why is my ecommerce store slow?
The most common causes of slow ecommerce stores are: too many third-party scripts (apps, analytics, chat widgets), unoptimised images (large files without WebP/lazy loading), heavy themes with excessive CSS/JavaScript, slow server response times (especially on cheap hosting), and render-blocking resources. PageDiag identifies exactly which issues affect your store.
How does store speed affect my sales?
Research from Deloitte shows a 0.1-second improvement in load speed increases ecommerce conversions by 8.4%. Google confirms that 53% of mobile visitors abandon sites taking over 3 seconds. For a store doing £50K/month, a 2-second speed improvement could mean £5K-10K in additional monthly revenue - without extra ad spend.
Does this work with Shopify, WooCommerce, and other platforms?
Yes - PageDiag works with all ecommerce platforms: Shopify, WooCommerce, BigCommerce, Magento, Squarespace, Wix, PrestaShop, and any custom-built store. We also offer platform-specific scanners with tailored recommendations for Shopify and WooCommerce.
Is this speed test free?
Yes, completely free. Enter your store URL and get a full performance report with Core Web Vitals, SEO insights, and actionable recommendations. No account or credit card required.
Ready to find out if your store is fast enough?
Enter your URL above or scan from the homepage. Free scan, instant results, no account needed.