From netlify-skills
Guides Netlify Image CDN for on-the-fly image optimization, transformations via query params, responsive markup, remote allowlisting, clean URL rewrites, caching, and user-uploaded pipelines with Functions + Blobs.
npx claudepluginhub netlify/context-and-tools --plugin netlify-skillsThis skill uses the workspace's default tool permissions.
Every Netlify site has a built-in `/.netlify/images` endpoint for on-the-fly image transformation. No configuration required for local images.
Designs responsive image pipelines with srcset, AVIF/WebP formats, lazy loading, and sizes queries. Generates code for Next.js, Nuxt, Blazor, vanilla HTML/CSS.
Guides Cloudflare Images usage: upload/store/serve images globally, transformations (resize/optimize WebP/AVIF), direct creator uploads, variants, signed URLs, Workers, Next.js/Remix integration.
Optimizes web images using WebP/AVIF formats, responsive srcset/picture elements, lazy loading, and Sharp for Node.js. Improves page loads, responsive images, production assets.
Share bugs, ideas, or general feedback.
Every Netlify site has a built-in /.netlify/images endpoint for on-the-fly image transformation. No configuration required for local images.
<img src="/.netlify/images?url=/photo.jpg&w=800&h=600&fit=cover&q=80" />
| Param | Description | Values |
|---|---|---|
url | Source image path (required) | Relative path or absolute URL |
w | Width in pixels | Any positive integer |
h | Height in pixels | Any positive integer |
fit | Resize behavior | contain (default), cover, fill |
position | Crop alignment (with cover) | center (default), top, bottom, left, right |
fm | Output format | avif, webp, jpg, png, gif, blurhash |
q | Quality (lossy formats) | 1-100 (default: 75) |
When fm is omitted, Netlify auto-negotiates the best format based on browser support (preferring webp, then avif).
External images must be explicitly allowed in netlify.toml:
[images]
remote_images = ["https://example\\.com/.*", "https://cdn\\.images\\.com/.*"]
Values are regex patterns.
Create user-friendly image URLs with redirects:
# Basic optimization
[[redirects]]
from = "/img/*"
to = "/.netlify/images?url=/:splat"
status = 200
# Preset: thumbnail
[[redirects]]
from = "/img/thumb/:key"
to = "/.netlify/images?url=/uploads/:key&w=150&h=150&fit=cover"
status = 200
# Preset: hero
[[redirects]]
from = "/img/hero/:key"
to = "/.netlify/images?url=/uploads/:key&w=1200&h=675&fit=cover"
status = 200
[[headers]]
for = "/uploads/*"
[headers.values]
Cache-Control = "public, max-age=31536000, immutable"
Combine Netlify Functions (upload handler) + Netlify Blobs (storage) + Image CDN (serving/transforming) to build a complete user-uploaded image pipeline. See references/user-uploads.md for the full pattern.