Shopify store speed directly affects conversion rates — research consistently shows that every 1-second improvement in page load time increases conversions by 7%. Images are typically the largest files on any Shopify store, making them the highest-priority optimisation target. At imgresizr.com, you can optimise images for your Shopify theme before uploading, completely free.
Shopify Image Size Guide
| Use Case | Recommended Size |
|---|---|
| Product images | 2048×2048px square |
| Collection images | 1024×1024px square |
| Hero/banner | 1920×600–1080px |
| Blog post image | 1200×630px |
| Logo | 400px wide max |
How to Optimise Images for Shopify at imgresizr.com
Upload your product photo to imgresizr.com. For product images, Shopify recommends a 2048×2048px square format — this provides high quality for zoom functionality while maintaining manageable file sizes. Use the Crop tool to set a 1:1 square ratio with a clean white background. Use the Enhance tool to ensure colours are accurate and the product is sharp. Convert to WebP using the Convert tool — Shopify has supported WebP uploads since 2021. Use the Compress tool targeting under 1MB per product image — Shopify processes and serves multiple thumbnail sizes from your upload, so starting with a clean, compressed source reduces server processing. For hero and banner images, resize to 1920×600px and compress to under 300KB.
Shopify Image Optimisation Tips
- Product images should be consistent in dimensions and background across your entire store for a premium feel
- Include 3–5 product images per listing: main product shot, side view, back view, in-use shot, and detail shot
- Add descriptive alt text to every product image — it is a direct Shopify SEO ranking factor
- Use Shopify's built-in image CDN — do not host images externally and reference them via URL
- Check Google PageSpeed for your store's product pages after each batch of optimisations
Optimise images for Shopify themes and product listings before uploading, free at imgresizr.com.