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FastToolAI

ICO Generator

Free online ICO icon generator

Upload a JPG, PNG, or WebP image and generate a multi-size ICO icon for website favicons and app icons. Your file is processed in your browser and will not be uploaded to the server.

Single image uploadMulti-size ICO outputKeep transparent backgroundBrowser local processingFree to use

Drag image here

or

Only 1 image is supported

Supports JPG / PNG / WebP formats

Your file is processed in your browser and will not be uploaded to the server.

100% local processing

All operations are completed in your browser, and files are not uploaded to a server.

Safe and private

Your file stays on this device, helping protect private images and brand assets.

Free to use

Generate ICO files for websites and apps without registration or hidden limits.

Multi-platform support

Works in modern browsers on Windows, Mac, iPhone, Android, and more.

How to generate ICO icons

1

Upload image

Choose a JPG, PNG, or WebP image file.

2

Choose icon sizes

Select common ICO sizes from 16x16 to 256x256.

3

Preview ICO effect

Check the generated icon previews at multiple sizes.

4

Download ICO file

Download the generated ICO file for your website or app.

Why choose FastToolAI ICO Generator?

  • Free to use for favicon and app icon generation.
  • Browser-local processing keeps your image private.
  • Multi-size output supports common ICO icon requirements.
  • Transparent backgrounds can be preserved for logo icons.
  • High quality scaling keeps small icons clearer.

Common use cases for ICO Generator

  • Website favicon files for browser tabs and bookmarks.
  • Application icons for desktop or internal tools.
  • Windows shortcut icons generated from a brand image.
  • Browser bookmark icons for personal projects.
  • Consistent brand icons across websites and apps.

Related image tools

Image Compress

Reduce image file size.

Resize Image

Adjust image dimensions.

Crop Image

Crop image size and ratio.

PNG to JPG

Convert PNG images to JPG.

Image to WebP

Convert images to WebP.

Image to PDF

Create PDFs from images.

FAQ

Which image formats are supported?

You can upload JPG, JPEG, PNG, and WebP images. The result is an ICO file.

Which sizes are included in the ICO file?

You can include 16x16, 32x32, 48x48, 64x64, 128x128, and 256x256 icons.

Will transparent backgrounds be preserved?

Yes. Keep transparent background enabled for PNG or WebP images with transparency. If disabled, the canvas is filled with white.

Can the ICO file be used as a website favicon?

Yes. The generated favicon.ico file can be used for websites, browser tabs, and bookmarks.

Will the generated ICO file be large?

File size depends on the selected sizes and image details. The completed state shows the real ICO Blob size.

Is my image processed on the server?

No. This tool reads, scales, previews, and packages the ICO file locally in your browser.

Can I customize output sizes?

You can select or remove the supported standard ICO sizes before generating.

Is there a quantity limit for generating ICO files?

This tool processes one image at a time. You can generate another ICO after finishing the current one.