Image Optimization
Learn how fast.site converts images to WebP, checks browser support and delivers optimized or original files for each image format.
Automatic WebP Conversion
fast.site automatically converts your images to WebP format for browsers that support it. WebP images are typically 25-50% smaller than equivalent JPEGs, up to 80% on photo-heavy assets, with no visible quality loss.
Original JPEG
2.4 MB
3.2s load time
fast.site WebP
680 KB
0.9s load time
No changes needed: Your original images stay on your server. We convert and cache WebP versions automatically at the edge.
How It Works
- 1
Browser requests an image
Modern browsers send an Accept header indicating WebP support
- 2
fast.site detects WebP support
We check if the browser can display WebP images
- 3
WebP version is served
The optimized WebP is delivered; older browsers get the original
Supported Formats
JPEG
→ WebP
PNG
→ WebP
GIF
Preserved
SVG
Preserved
Animated GIFs and SVGs are served as-is since they don't benefit from WebP conversion.
Impact on Core Web Vitals
- LCP improves 40-60%. Hero images load faster
- Bandwidth reduced 25-50%. Lower hosting costs
- PageSpeed score improves. "Serve images in next-gen formats" resolved