This content originally appeared on DEV Community and was authored by saida lachgar
Images are crucial for engagement but can slow down your website. Proper optimization improves load times, SEO rankings, and accessibility.
Storage Options
- src/ directory: Use for automatic optimization (compression, resizing, format conversion)
- public/ directory: Use for images that don't need processing or require direct URLs
Astro's Optimization Components
The <Image> Component
import { Image } from 'astro:assets';
import myImage from '../src/images/my-image.jpg';
<Image
src={myImage}
alt="Mountains at sunrise"
width={800}
height={600}
/>
Benefits:
- Automatic compression and WebP conversion
- Required alt text for accessibility
- Built-in lazy loading
The <Picture> Component
import { Picture } from 'astro:assets';
import myImage from '../src/images/my-image.jpg';
<Picture>
<source srcset={myImage} type="image/webp" />
<source srcset={myImage} type="image/jpeg" />
<img src={myImage} alt="Mountains at sunrise" width={800} height={600} />
</Picture>
Benefits:
- Responsive design across devices
- Multiple format support for browser compatibility
Best Practices
- Choose appropriate formats (JPEG for photos, PNG for transparency, WebP for best compression)
- Compress images to under 100KB when possible
- Use descriptive alt text for accessibility and SEO
- Take advantage of lazy loading
- Always specify image dimensions to prevent layout shifts
Implementing these optimization techniques in Astro will significantly improve your site's performance, user experience, and search engine rankings.
For a deeper dive into optimizing Astro websites for SEO, including plugins and performance tips, check out my comprehensive guide.
Happy coding! 🚀
This content originally appeared on DEV Community and was authored by saida lachgar
saida lachgar | Sciencx (2025-02-24T22:50:39+00:00) Image Optimization in Astro: Boost Site Performance and SEO. Retrieved from https://www.scien.cx/2025/02/24/image-optimization-in-astro-boost-site-performance-and-seo/
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