image-optimization
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.
- Installs
- 589
- Last 24h
- —
- Trending rank
- —
- Security
- Not audited
Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/secondsky/claude-skills --skill image-optimization- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads image-optimization automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
Image Optimization
Optimize images for web performance with modern formats and responsive techniques.
Format Selection
| 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 |
Responsive Images
<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>
Lazy Loading
<!-- 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"
>
Build Pipeline (Sharp)
const sharp = require('sharp');
async function optimizeImage(input, output) {
await sharp(input)
.resize(1200, null, { withoutEnlargement: true })
.webp({ quality: 80 })
.toFile(output);
}
Performance Targets
| Asset Type | Target Size |
|---|---|
| Hero image | <200KB |
| Thumbnail | <30KB |
| Total images | <500KB |
Optimization Checklist
- Use WebP with JPEG fallback
- Implement responsive srcset
- Enable lazy loading for below-fold
- Compress at quality 70-85
- Serve from CDN
- Set proper cache headers
FAQ
What does the image-optimization skill do?
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.
How do I install image-optimization?
Run npx skills add https://github.com/secondsky/claude-skills --skill image-optimization in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/image-optimization/ (personal) or .claude/skills/image-optimization/ (project).
Which AI agents can use image-optimization?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is image-optimization safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains image-optimization?
It is published by secondsky in secondsky/claude-skills. It has 589 recorded installs.
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