favicon-generator
When the user wants to implement, optimize, or audit favicon and app icons. Also use when the user mentions "favicon," "app icon," "browser icon," "touch icon," "PWA icon," "favicon sizes," "apple-touch-icon," "favicon.ico," "site icon," or "tab icon." For visual system, use brand-visual-generator.
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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/kostja94/marketing-skills --skill favicon-generator- 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 favicon-generator 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.
Components: Favicon
Guides favicon and app icon implementation for brand consistency across browser tabs, bookmarks, mobile home screens, and Google Search results. Favicons help users identify sites; missing or incorrect icons hurt trust.
When invoking: On first use, if helpful, open with 1-2 sentences on what this skill covers and why it matters, then provide the main output. On subsequent use or when the user asks to skip, go directly to the main output.
Initial Assessment
Project context: Read root contextus.md when present and load only the modules relevant to this task. Without Contextus, use available project material or user-provided facts and ask for missing information; do not create a parallel context system.
Identify:
- Tech stack: Next.js, WordPress, static HTML, etc.
- PWA: Is the site a PWA or planning to be?
- Existing assets: Logo, icon files
Required Sizes
| Size | Use |
|---|---|
| 16x16 | Browser tabs, standard displays |
| 32x32 | Retina/HiDPI browser tabs |
| 180x180 | Apple Touch Icon (iOS home screen); no transparency |
| 192x192 | Android Chrome home screen, PWA launcher |
| 512x512 | PWA splash screens, adaptive icons |
Optional: 48x48, 96x96, 120x120, 152x152, 167x167, 256x256 for broader coverage.
Formats
| Format | Use |
|---|---|
| SVG | Modern browsers; scalable; supports dark mode via media queries; lightweight |
| PNG | High-DPI; explicit sizes; easy to generate; required for Apple Touch Icon |
| ICO | Legacy; bundles multiple sizes; fallback for older browsers |
Recommended: Provide SVG + PNG fallbacks. Never skip Apple Touch Icon (180x180); iOS shows a generic screenshot without it.
Google Search (SERP Display)
See serp-features for SERP feature types and optimization.
Favicons can appear in Google Search results next to your site's listings. Google Search Central requirements:
| Requirement | Guideline |
|---|---|
| Placement | Add <link rel="icon" href="/path/to/favicon.ico"> to homepage header |
| One per hostname | One favicon per hostname; example.com and code.example.com are separate; example.com/sub-site shares the same favicon |
| Crawlability | Googlebot-Image must crawl favicon; Googlebot must crawl homepage; do not block either in robots.txt |
| Shape | Square (1:1 aspect ratio); minimum 8x8px; preferably >48x48px for quality across platforms |
| Stable URL | Do not change favicon URL frequently |
| Appropriate | No inappropriate content (pornography, hate symbols); Google may replace with default icon |
| Timing | Crawling can take days to weeks; use Search Console URL Inspection to request indexing |
Supported rel values: icon, shortcut icon, apple-touch-icon, apple-touch-icon-precomposed. href can be relative (/favicon.ico) or absolute; favicon can be hosted on CDN.
Implementation
HTML Link Tags
<link rel="icon" href="/favicon.ico" sizes="any">
<link rel="icon" href="/icon.svg" type="image/svg+xml">
<link rel="icon" type="image/png" sizes="32x32" href="/favicon-32.png">
<link rel="apple-touch-icon" sizes="180x180" href="/apple-touch-icon.png">
Next.js
Place in /app: favicon.ico, icon.png, apple-icon.png. Next.js auto-generates tags.
PWA Manifest
Include icons array in manifest.json with 192x192 and 512x512 for maskable icons.
Best Practices
- Simplicity: At 16x16, complex details are illegible; use simplified logo mark; design for brand recognition in SERPs
- Consistency: Favicon should match logo/brand (logo-generator, brand-visual-generator)
- Cache: Use long cache; version for updates (e.g.
/favicon.ico?v=2) - Tools: RealFaviconGenerator, favicon.io, or favicons npm package for automation
- Test: Check across browsers, dark mode, and Search Console (favicon may take days to weeks to appear)
Output Format
- Size checklist (16, 32, 180, 192, 512; >48x48 for Google Search)
- Format recommendations (SVG, PNG, ICO)
- Implementation notes per tech stack (homepage header placement)
- Google Search checklist (crawlability, stable URL, appropriate content)
- Manifest (if PWA)
Related Skills
- logo-generator: Favicon typically derived from logo; consistent branding
- media-kit-page-generator: Media kit should include favicon or link to brand assets
- brand-visual-generator: Visual identity; favicon aligns with brand colors and mark
- indexing: Favicon requires crawlable homepage; URL Inspection for indexing
FAQ
What does the favicon-generator skill do?
When the user wants to implement, optimize, or audit favicon and app icons. Also use when the user mentions "favicon," "app icon," "browser icon," "touch icon," "PWA icon," "favicon sizes," "apple-touch-icon," "favicon.ico," "site icon," or "tab icon." For visual system, use brand-visual-generator.
How do I install favicon-generator?
Run npx skills add https://github.com/kostja94/marketing-skills --skill favicon-generator 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/favicon-generator/ (personal) or .claude/skills/favicon-generator/ (project).
Which AI agents can use favicon-generator?
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 favicon-generator 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 favicon-generator?
It is published by kostja94 in kostja94/marketing-skills. It has 1,077 recorded installs.
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