Ecommerce SEO Checker & Site Speed Audit
Slow ecommerce sites lose customers and search rankings. Check your site speed and SEO health in 30 seconds - get Core Web Vitals scores, technical SEO insights, and actionable fixes for any platform.
What We Check
Performance
Core Web Vitals (LCP, CLS, FCP, TTFB), JavaScript payload, render-blocking resources, image optimisation, and server response time.
Technical SEO
Meta tags, heading structure, canonical URLs, structured data, image alt text, mobile responsiveness, and crawlability.
Third-Party Impact
Every external script identified and measured - analytics, chat widgets, payment providers, and tracking pixels.
Why Ecommerce Site Speed Matters
For ecommerce stores, site speed isn't just a technical metric - it's a revenue lever. Research consistently shows that faster sites convert better:
- •A 0.1-second improvement in load speed increases conversions by 8.4% (Deloitte, 2024)
- •53% of mobile visitors abandon sites that take over 3 seconds to load (Google)
- •Core Web Vitals are a confirmed Google ranking signal, affecting your organic search visibility
For a store doing £50K/month, a 2-second speed improvement could mean £5K-10K in additional monthly revenue - without spending a penny more on ads.
Platform-Specific Scanners
Shopify Speed Test
Shopify-specific performance analysis with app bloat detection.
WooCommerce Audit
WooCommerce performance audit with hosting and plugin analysis.
BigCommerce Scanner
BigCommerce store analysis with Stencil theme insights.
Magento Scanner
Magento/Adobe Commerce diagnostics with extension analysis.
Related Reading
Core Web Vitals for Ecommerce
What LCP, CLS, and FCP mean for your online store.
Page Speed vs Conversions
The data on how load time affects your bottom line.
Fastest Ecommerce Platforms
Performance comparison across all major platforms.
AI Shopping Readiness
Check if your store is optimised for AI shopping assistants.
Frequently Asked Questions
How do I check my ecommerce site speed?
Enter your store URL in the scanner above. PageDiag analyses your Core Web Vitals (LCP, CLS, FCP, TTFB), JavaScript payload, image optimisation, server response time, and third-party script impact. You get a detailed report with scores and prioritised fixes in under 60 seconds.
What is a good speed score for an ecommerce site?
A PageDiag score of 80+ is excellent. Google considers LCP under 2.5 seconds, CLS under 0.1, and FCP under 1.8 seconds as "good". For ecommerce specifically, faster is directly more profitable - research shows a 0.1-second improvement in load speed increases conversions by 8.4%.
Does site speed affect ecommerce SEO?
Yes - Google uses Core Web Vitals as a ranking signal. Slow ecommerce sites rank lower in search results, reducing organic traffic. More importantly, slow sites have higher bounce rates and lower conversion rates, compounding the revenue impact beyond just rankings.
What does the ecommerce SEO audit check?
Beyond speed, PageDiag checks meta tags, heading structure, canonical URLs, structured data (Product, BreadcrumbList, Organization schema), image alt text, mobile responsiveness, crawlability, and internal linking - all the technical SEO factors that affect search visibility.
Which ecommerce platforms does this work with?
PageDiag works with all ecommerce platforms: Shopify, WooCommerce, BigCommerce, Magento, Squarespace, Wix, PrestaShop, and any custom-built store. We also have platform-specific scanners with tailored recommendations for each platform.
Is this ecommerce speed checker free?
Yes, completely free. Enter your store URL and get a full performance and SEO audit with actionable recommendations. No account or credit card required.
Ready to check your ecommerce site speed?
Enter your URL above or scan from the homepage. Free, instant results for any ecommerce platform.