Image Toolkit

Free online image tool

ICO Converter

Create ICO files from common image formats for favicons, desktop icons, and app assets.

ICO Preview

Preview appears here

Upload an image to start processing.

What is this tool?

ICO Converter creates icon files from common image sources for favicons, desktop shortcuts, small app assets, and interface prototypes. ICO is a specialized icon format, so the best results come from images that are simple, square, and easy to recognize at very small sizes.

Use this page when you want a quick icon file without opening a full design tool. A logo mark, symbol, product badge, or simplified graphic usually works better than a detailed photograph. If your source image is rectangular, crop or resize it first so the icon has balanced spacing.

This browser-first converter is meant for practical icon generation and testing. For production brand systems, keep your original vector or high-resolution source files and generate icons at all required sizes through your final website or app build process.

How to use ICO Converter

Follow these steps to process your image locally in the browser and download the result.

  1. Step 1

    Upload a PNG, JPG, or supported browser-readable image.

  2. Step 2

    Use a square source image for the cleanest icon output.

  3. Step 3

    Convert the image to ICO.

  4. Step 4

    Download the generated ICO file.

  5. Step 5

    Test the icon in the target website, shortcut, or app workflow.

Key features

  • Creates ICO files from common image formats.
  • Useful for favicons, shortcuts, and simple app icon assets.
  • Works best with square, high-contrast artwork.
  • No account or desktop icon editor is required.
  • Keeps the source image unchanged.
  • Can be used after crop, resize, or PNG conversion tools.

Supported formats

Input depends on browser image decoding and commonly includes PNG and JPG. Output is ICO. For transparent icons, start from PNG rather than JPG.

Common use cases

  • Convert an image when a website, app, form, or publishing platform rejects the original format.
  • Create a more compatible copy for clients, classmates, teammates, marketplaces, or support teams.
  • Prepare website assets by choosing a format that fits transparency, compatibility, or performance needs.
  • Keep the original file unchanged while exporting a new version for a specific destination.

Limitations to know

  • Conversion quality depends on how the browser decodes the source image and exports the target format.
  • Transparency may be lost when converting to formats that do not support transparent pixels, such as JPG.
  • Very large images can require more device memory and may process more slowly on phones or older computers.
  • The exported file is a new browser-generated copy, so you should keep your original file if you may need to edit it again.

Privacy note

ImageToolkit is designed to handle this task in your browser whenever the selected file type is supported. The image you choose is processed on your device for preview and export, and ImageToolkit does not require an account or intentionally upload the original image to an ImageToolkit server for these browser-first tools.

Related image tools

convert

PNG to ICO Converter

Convert PNG images to ICO files for favicons, app icons, and desktop shortcuts.

convert

JPG to ICO Converter

Convert JPG images to ICO files with browser-based icon generation.

resize

Image Resizer

Resize JPG, PNG, or WebP images by entering custom width and height.

compress

Image Compressor

Reduce image file size by adjusting output quality before downloading.

Frequently Asked Questions

What images work best for ICO conversion?+

Simple square images with strong contrast work best. Detailed photos or tiny text can become hard to recognize.

Can I make a favicon with the ICO Converter?+

Yes. The generated ICO can be used in favicon workflows, though modern sites may also use PNG and SVG favicons.

Should I use PNG or JPG as the source?+

Use PNG for transparent or logo-style icons. JPG can work for photo-based shortcut icons but does not support transparency.

Why does my icon look cropped?+

The source image may not be square or may not have enough padding. Crop or resize it before converting.

Are icon files processed locally?+

ImageToolkit is designed to handle this task in your browser whenever the selected file type is supported. The image you choose is processed on your device for preview and export, and ImageToolkit does not require an account or intentionally upload the original image to an ImageToolkit server for these browser-first tools.