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ICO Generator

Processing and format details+
Core processing
100% browser-local
Tool data upload
No application-server upload
Browser technology
Web Worker + JSquash PNG WASM
Formats / output
Static images → multi-size PNG-layer ICO

LOCAL ICON MAKER

Generate a multi-size ICO

Create one Windows-compatible ICO with the sizes you select. Transparent PNG, WebP and AVIF sources retain their transparency.

Embed these sizes

Every selected size is stored inside one .ico file. For the sharpest result, start with a square source that is at least 256 × 256 pixels.

Choose an image to begin.

Your icon source preview will appear here

About this tool+

Choose an image, select 16, 24, 32, 48, 64, 128 or 256 pixel layers, then download one Windows-compatible ICO file. Transparent PNG, WebP and AVIF source images keep their alpha channel.

BEST FOR

Designers and developers creating website favicons, web-app assets, Windows shortcuts or project icons.

  • Embed several icon sizes in one ICO file
  • Choose common layers from 16 to 256 pixels
  • Keep transparency from PNG, WebP and AVIF sources
  • Encode and download the ICO entirely in your browser
How to use+
  1. 1

    Choose a clear source image

  2. 2

    Select the icon sizes to include

  3. 3

    Create the ICO locally

  4. 4

    Download it for a favicon or application icon

Tips and examples+

PRACTICAL EXAMPLE

Generate a useful ICO from one clear square source image

ICO is a container that usually includes several pixel sizes, allowing a browser or operating system to pick an appropriate layer. A source image with a clear square silhouette survives small sizes better, and a transparent source can retain transparent areas.

Example: add a favicon for a website

Prepare a square PNG with comfortable edge padding, select 16, 32, 48, 64, 128 and 256 pixels, then create the ICO. A site should normally provide PNG or SVG favicons as well for modern browsers; the ICO can serve as a compatibility layer or Windows icon asset.

Before you use it

  • At 16 or 32 pixels, are the primary shape and colors still easy to identify?
  • Do the chosen sizes cover the website favicon, application icon or Windows-shortcut use case?
  • Keep the original design file; the ICO is an exported icon asset

Frequently asked questions about ICO Generator

Frequently asked questions+

Which icon sizes are included?

The ICO includes every size you select. The default selection is 16, 32, 48, 64, 128 and 256 pixels.

Will a transparent background remain transparent?

Yes. PNG, WebP and AVIF sources with transparency are written as PNG icon layers with alpha.

Is my image uploaded?

No. Scaling, ICO encoding and download happen in your current browser.

How does GlobalCoreHub handle data in ICO Generator?

GlobalCoreHub runs the core ICO Generator workflow in the current browser. Tool input is not uploaded to the GlobalCoreHub application server; any local saving described on this page stays in the current browser until its site data is cleared.

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