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webp-format

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Use when reviewing image assets, markup, and CDN or build transforms related to Use WebP format with fallbacks. Check encoded size, rendered size, loading strategy, and above-the-fold impact together.

skills/webp-format/SKILL.md

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# Use WebP format with fallbacks

WebP is smaller than JPEG and PNG at similar quality—using it reduces page weight by 25-35% for images, improving load times on all devices.

## Quick Reference

- WebP provides 25-35% better compression than JPEG/PNG
- 97%+ browser support—nearly universal
- Use picture element for older browser fallbacks
- Supports transparency (like PNG) and animation (like GIF)

## Check

Check if images are served in modern formats like WebP with fallbacks for older browsers.