/favicon-gen

name: favicon-gen
description: "Generate custom favicons from logos, text, or brand colours. Produces favicon.svg, favicon.ico, apple-touch-icon.png, icon-192/512.png, and web manifest. Use whenever the user wants a favicon, mentions replacing a CMS default favicon, converting a logo into a favicon, creating branded initials icons, or troubleshooting favicon not displaying / iOS black square / missing manifest."
compatibility: claude-code-only

Favicon Generator

Generate a complete favicon package from a logo, initials, or brand colours. Produces all required formats and HTML integration code.

Workflow

Step 1: Choose Your Approach

Have a logo with an icon element?
 YES -> Extract icon from logo
 NO  -> Have text/initials?
         YES -> Create monogram favicon
         NO  -> Use branded shape

Step 2: Create Source SVG

**Extracted icon** — copy icon paths from logo, centre in 32x32 viewBox, simplify for small sizes.

**Monogram** — use a template from `assets/`:

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32 32">
  <circle cx="16" cy="16" r="16" fill="#0066cc"/>
  <text x="16" y="21" font-size="16" font-weight="bold"
        text-anchor="middle" fill="#ffffff" font-family="sans-serif">AC</text>
</svg>

**Branded shape** — circle (universal), rounded square (modern), shield (security), hexagon (tech).

SVG templates available in `assets/` directory.

Step 3: Generate All Formats

Requires ImageMagick (`convert` command). Install if needed: `brew install imagemagick` (macOS) or `apt install imagemagick` (Linux).

# ICO (16x16 + 32x32)
convert favicon.svg -define icon:auto-resize=16,32 favicon.ico

# Apple Touch Icon (180x180, SOLID background — transparent = black on iOS)
convert favicon.svg -resize 180x180 -background "#0066cc" -alpha remove apple-touch-icon.png

# Android/PWA icons
convert favicon.svg -resize 192x192 icon-192.png
convert favicon.svg -resize 512x512 icon-512.png

**No ImageMagick?** Use https://favicon.io to convert from the SVG instead.

Step 4: Create Web Manifest

Copy and customise `assets/manifest.webmanifest`:

{
  "name": "Your Business Name",
  "short_name": "Business",
  "icons": [
    { "src": "/icon-192.png", "sizes": "192x192", "type": "image/png" },
    { "src": "/icon-512.png", "sizes": "512x512", "type": "image/png" }
  ],
  "theme_color": "#0066cc",
  "background_color": "#ffffff",
  "display": "standalone"
}

Step 5: Add HTML Tags

<link rel="icon" type="image/svg+xml" href="/favicon.svg">
<link rel="icon" type="image/x-icon" href="/favicon.ico">
<link rel="apple-touch-icon" sizes="180x180" href="/apple-touch-icon.png">
<link rel="manifest" href="/site.webmanifest">
<meta name="theme-color" content="#0066cc">

Place all files in site root (`/public/` in Vite/React).

---

Critical Rules

• **Always generate ALL formats** — SVG, ICO, apple-touch-icon, 192, 512, manifest
• **iOS icons MUST have solid backgrounds** — transparent = black square
• **Always use bold font weight** for monogram text (regular disappears at 16x16)
• **Test at 16x16** — if it's not legible, simplify
• **Never launch with CMS defaults** (WordPress "W", etc.)

Format Quick Reference

| Format | Size | Transparency | Purpose | |--------|------|-------------|---------| | `favicon.svg` | Vector | Yes | Modern browsers | | `favicon.ico` | 16+32 | Yes | Legacy browsers | | `apple-touch-icon.png` | 180x180 | **No** | iOS home screen | | `icon-192.png` | 192x192 | Yes | Android | | `icon-512.png` | 512x512 | Yes | PWA |

Asset Files

• `assets/favicon-svg-circle.svg` — Circle monogram template
• `assets/favicon-svg-square.svg` — Rounded square template
• `assets/favicon-svg-shield.svg` — Shield template
• `assets/manifest.webmanifest` — Web manifest template

Reference Files

• `references/format-guide.md` — Complete format specifications
• `references/extraction-methods.md` — Logo icon extraction steps
• `references/monogram-patterns.md` — Advanced monogram design
• `references/shape-templates.md` — Industry-specific shapes with SVG code