Choosing the wrong image format can silently hurt your page speed, Core Web Vitals, and SEO.
SVG, PNG, and WebP all exist for a reason — but they solve very different problems.
In this guide, I break down:
- ✅ When SVG is better than PNG (and when it’s not)
- ✅ Why WebP is the best choice for most photos
- ✅ How image formats affect SEO & Core Web Vitals
- ✅ Real-world use cases for icons, screenshots, and hero images
- ✅ A simple optimization workflow devs can follow
If you work with frontend performance, CSS, or modern web apps, this will save you from shipping unnecessary KBs 🚀
👉 Read the full article:
SVG vs PNG vs WebP: Which Image Format Should You Use and When?
🔧 Bonus: Includes tips for using SVG Optimizers and Image Converters effectively.
Top comments (1)
Really useful comparison. The WebP section is especially relevant for ecommerce — product images are often the LCP element and WebP can halve their file size without visible quality loss.
One angle worth adding for ecommerce product images: image format is just one part of the optimization picture. For Shopify product catalogs specifically, visual consistency is often just as important for both performance and conversion. Inconsistent backgrounds across product images cause Cumulative Layout Shift (CLS) and reduce visual trust — shoppers notice when images look mismatched even if they can't articulate why.
I built Eye Catching (apps.shopify.com/beautiful-brands) to address this — it standardizes product image backgrounds, adds overlays, and applies badges uniformly across an entire Shopify catalog. Combined with serving images in WebP, you get both the performance gains you've outlined and better visual consistency.
For navigation performance, Prefetch (apps.shopify.com/prefetch) preloads Shopify pages on hover so transitions feel instant — complementing image-level optimizations with navigation-level speed.
(Disclosure: I built both under Stackedboost.) Great format comparison guide — the WebP/AVIF tradeoffs section is particularly well explained.