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ICO Generator

Generate a single .ico file bundling multiple sizes (16–256px) from one image.

Input data is processed in your browser
Data is never sent to a server

Tool

Drag & drop an image file here, or paste (Ctrl+V)

Images are processed entirely in your browser and never sent to a server.

What is the ICO Generator?

The ICO Generator lets you produce a single .ico file bundling multiple sizes — from 16×16 up to 256×256px — chosen from one source image. It’s designed for general-purpose use cases such as desktop application icons.

Unlike the Favicon Generator (which is tailored to websites and also outputs PNG sets and an HTML snippet), this tool is a simpler option when you just need a single .ico file with the sizes you specify.

All processing happens entirely in your browser using the Canvas API — your image data is never sent to a server. The ICO file is assembled using the modern PNG-based ICO format, without relying on any external library.

Use Cases

  • Create an icon file for a desktop application
  • Export a general-purpose .ico file from a logo image
  • Bundle multiple sizes into a single ICO file for distribution

How to Use

  1. Select a source image (a square image is recommended), or drag and drop it.
  2. Check the sizes (16–256px) you want to include in the ICO file.
  3. Click "Generate ICO".
  4. Preview how each size will look.
  5. Click "Download ICO file" to save it as a single .ico file.

FAQ

Is this tool free?

Yes, it is completely free to use.

Is my image sent to a server?

No. All processing happens in your browser using the Canvas API. Images are never uploaded to a server.

How is this different from the Favicon Generator?

The Favicon Generator produces a full web-favicon set (favicon.ico, several PNG sizes, and an HTML snippet) for websites. The ICO Generator is a simpler, general-purpose tool that bundles only the sizes you choose (16–256px) into a single .ico file — useful for desktop app icons and similar uses.

What happens if my image isn't square?

It's automatically center-cropped to a square when generating the icon. For predictable results, start with a square image.

Which sizes should I pick?

For Windows desktop app icons, 16, 32, 48, and 256px are commonly used. Choose whichever sizes fit your use case.

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