What is the best image format for websites?

WebP offers the best compression for web use, producing files 25-35% smaller than JPEG at equivalent quality. It's supported by all modern browsers (Chrome, Firefox, Safari, Edge). Use WebP as your default, with JPEG as a fallback for older browsers.

How does image optimization affect Core Web Vitals?

Large images directly impact Largest Contentful Paint (LCP), one of Google's Core Web Vitals. Optimized images load faster, improving LCP scores. Smaller images also reduce Cumulative Layout Shift (CLS) when proper width/height attributes are used. Better Core Web Vitals can improve your search rankings.

What quality setting should I use for web images?

For most web images, 80% quality provides the best balance between file size and visual quality. The difference between 80% and 100% is barely visible to the human eye, but the file size difference is significant (often 40-60% smaller). For hero images, try 85%. For thumbnails, 70% is usually fine.

What should the maximum image width be for websites?

For most websites, 1920px is the maximum useful width (matching full HD displays). Many sites use 1200-1600px for content images. Serving images wider than your layout needs wastes bandwidth. Use responsive images (srcset) to serve different sizes to different devices.

How much can I reduce image file sizes for web?

Typically 50-80% reduction is achievable without noticeable quality loss. A 2MB JPEG photo can often be reduced to 200-400KB as WebP at 80% quality. Combined with resizing to appropriate dimensions, total savings of 80-95% are common for unoptimized images.

Compress Images for Web

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Optimize your images for the web. Convert to WebP format, reduce file sizes, and improve your page load speed and Core Web Vitals scores. All processing happens in your browser — your files never leave your device.