favicon-gen

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

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Install skill "favicon-gen" with this command: npx skills add jezweb/claude-skills/jezweb-claude-skills-favicon-gen

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

Source Transparency

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