Optimizes images for web performance using modern formats, responsive techniques, and lazy loading strategies. Use when improving page load times, implementing responsive images, or preparing assets for production deployment.
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Optimize images for web performance with modern formats and responsive techniques.
| Format | Best For | Compression |
|---|---|---|
| JPEG | Photos | Lossy, 50-70% reduction |
| PNG | Icons, transparency | Lossless, 10-30% |
| WebP | Modern browsers | 25-35% better than JPEG |
| AVIF | Next-gen | 50% better than JPEG |
| SVG | Logos, icons | Vector, scalable |
<picture>
<source srcset="image.avif" type="image/avif">
<source srcset="image.webp" type="image/webp">
<img
src="image.jpg"
srcset="image-400.jpg 400w, image-800.jpg 800w, image-1200.jpg 1200w"
sizes="(max-width: 600px) 100vw, 50vw"
alt="Description"
loading="lazy"
decoding="async"
>
</picture>
<!-- Native lazy loading -->
<img src="image.jpg" loading="lazy" alt="Description">
<!-- With blur placeholder -->
<img
src="placeholder-blur.jpg"
data-src="image.jpg"
class="lazy"
alt="Description"
>
const sharp = require('sharp');
async function optimizeImage(input, output) {
await sharp(input)
.resize(1200, null, { withoutEnlargement: true })
.webp({ quality: 80 })
.toFile(output);
}
| Asset Type | Target Size |
|---|---|
| Hero image | <200KB |
| Thumbnail | <30KB |
| Total images | <500KB |
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