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Favicon Generator

Create a multi-size favicon.ico for websites from an image.

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About the Favicon Generator

Generate favicon.ico for Websites — Turn a square PNG, JPG or WebP into a multi-resolution favicon.ico file for browser tabs and website bookmarks.

Formula or method

The browser resizes your source image into multiple PNG sizes and packages them into ICO structure containing 16, 32, 48 and 256-pixel images.

Worked example

Upload a square 512-pixel transparent logo and download favicon.ico for your web project.

How to use the tool

  1. Select a clear square logo.
  2. Click Generate favicon.ico.
  3. Place the file at your website root or set a favicon link.

Common uses

Websites, branding, browser tabs.

Assumptions and limitations

Non-square sources may be stretched. Check appearance at 16 × 16 and 32 × 32 pixels. This does not generate a complete cross-platform manifest or Apple touch icon set.

Frequently asked questions

Should I use a transparent logo?

A square transparent PNG generally works best because it adapts to different browser backgrounds.

Privacy and support

Your inputs are processed locally in your browser. ToolMosaic does not upload or store the values you enter in this tool. Our tools are free, and we appreciate your support.