Auto Favicon

The Auto Favicon MCP Server automates the creation of a full favicon set from a single image.

You give it a high-quality PNG or a URL to an image, and it generates all the different icon files and sizes you need for a modern website.

This includes the classic favicon.ico, various PNG sizes for different devices, Apple touch icons for iOS, and even the manifest.json file for Progressive Web Apps (PWAs).

Use Cases

• New Project Setup: When starting a new web project, you can generate the entire favicon set in seconds. Point the server at your logo’s master PNG, and all the required assets are created instantly, letting you move on to more important tasks.
• PWA Conversion: If you’re upgrading an existing website to a Progressive Web App, this server is a huge time-saver. It handles the creation of the necessary icons and the manifest.json file, which are fundamental requirements for PWA installation prompts.
• Automated Branding Updates: For agencies or developers managing multiple sites, a branding refresh can be a chore. With this server, you could script the update process. Just point it to the new logo URL, and you can programmatically update the favicon sets across all your projects.

How to Use It

1. Add the MCP server to your MCP client’s configuration file. This tells your client how to find and run the favicon generator.

{
  "mcpServers": {
    "favicon-generator": {
      "command": "uvx",
      "args": ["auto-favicon"],
      "env": {}
    }
  }
}

2. Once configured, the server exposes two main tools you can call:

• generate_favicon_from_png: This tool takes the file path to a local PNG image and generates the complete favicon set from it.
• generate_favicon_from_url: This tool takes a public URL to an image, downloads it, and then generates the favicon set.

FAQs

Q: What is the best size for the input PNG image?
A: For the best results, use a high-resolution, square PNG image. Something like 512×512 or 1024×1024 pixels is ideal, as it will scale down cleanly to the smaller icon sizes without losing quality.

Q: Can I make changes to the generated manifest.json file?
A: The server generates a standard manifest.json file that works out-of-the-box for most PWAs. If you need to add more specific configurations, you can edit the file manually after it has been created. The server’s main job is to get you a solid starting point very quickly.

Q: Why would I use this instead of a free online favicon generator?
A: The main advantages are automation, speed, and privacy. This runs locally in your own environment, so you don’t have to upload company assets to a third-party service. It can also be integrated directly into your build scripts for a fully automated workflow.

Q: What is uv and why does this server require it?
A: uv is a modern, extremely fast Python package installer and resolver. The server uses it to execute its command, which helps keep the setup lightweight and ensures the process runs quickly without complex dependency management.