Optimizing Shopify Store Performance
Speed matters. We share our top techniques for making Shopify stores faster and improving Core Web Vitals scores.
Page speed directly impacts your bottom line. Studies show that a 1-second delay in page load can reduce conversions by 7%. For Shopify stores, performance optimization is critical.
Here are our top techniques:
Image Optimization: Use Shopify's image CDN with appropriate sizing. Never serve a 2000px image in a 400px container. Use the image_tag filter with width and height attributes.
Minimize JavaScript: Audit your installed apps — many inject heavy scripts that slow down your store. Remove unused apps and defer non-critical scripts.
Leverage Browser Caching: Configure proper cache headers for static assets. Shopify handles this well by default, but custom scripts may need attention.
Critical CSS: Inline the CSS needed for above-the-fold content and defer the rest. This dramatically improves First Contentful Paint.
Lazy Loading: Use native lazy loading for images below the fold. This reduces initial page weight significantly.
After applying these techniques to client stores, we typically see Lighthouse performance scores jump from 40-50 to 85-95.