Performance & SEO
Sellzar is engineered for speed. Learn how we achieve top-tier Core Web Vitals and how you can maintain these scores.
Built-in Optimizations
We use the srcsetattribute to serve the smallest possible image size based on the user's device resolution.
Only the styles needed for the current page are loaded, minimizing render-blocking resources.
Images and heavy scripts are only loaded as they enter the viewport, significantly improving the Largest Contentful Paint (LCP).
Rich results for products, breadcrumbs, and articles are baked directly into the theme for maximum search visibility.
Search & Discovery
Sellzar uses Shopify's Predictive Search APIto provide instant results. You can customize the discovery experience in **Theme Settings > Search**.
Advanced Script Management
Sellzar uses a proprietary Conditional Asset Loader to ensure that heavy JavaScript libraries never block the initial render.
The 900KB model-viewer.min.js library is only injected into the DOM if the theme detects a 3D model (media_type: 'model') on the current product page.
Sellzar uses a custom SVG-injection system that only renders the icons currently visible on the screen, reducing DOM complexity.