Create Favicon (ICO) Online
A favicon is a small website icon displayed in browser tabs. You can easily create a favicon in ICO format from PNG, JPEG, WebP, and other image formats in just one step.
What happens when you convert image to ICO
This page prepares image files for ICO output. The converter decodes the source image, redraws it on a clean canvas and exports a new file in the selected format. This is useful when you need a file that opens in more apps, loads faster on a website, or fits a specific publishing workflow.
Conversion workflow
- Upload one or several image files with the form above.
- The browser reads the image data and checks that the file type is supported.
- FormatKit creates a new ICO file and keeps the original file unchanged.
- Download the result immediately after processing.
Format details
| Input format | image |
|---|---|
| Output format | ICO |
| Transparency | Supported |
| Compression | Icon container for favicons and browser tabs |
| Compatibility | Designed for a specific publishing use case |
Best uses for ICO
- Creating a browser favicon from a logo or source image.
- Preparing a small website icon for tabs and bookmarks.
- Testing how a simplified image works at icon size.
Quality and limitations
The ICO result depends on the original image file and the export support in your browser. If a browser cannot decode or export a format, try PNG, JPEG or WebP as a more widely supported alternative.
File privacy
Conversion is designed to run in the browser whenever possible. Files are used only for the requested operation and are not published as a public archive.
Practical tips
- Keep the original image file until you have checked the downloaded ICO result.
- Use PNG when you need transparency and JPEG when compatibility matters most.
- For websites, compare WebP and AVIF output visually before replacing production images.
When to use .ico
Use ICO when you need a classic favicon file for browser tabs, bookmarks, older browsers or simple website setups that look for favicon.ico.
Favicon sizes
Classic favicon ICO files commonly include 16x16, 32x32 and 48x48 icon sizes. FormatKit creates a compact icon output from your source image for basic browser favicon use.
ICO vs PNG icons
PNG favicons are common on modern websites and can be referenced directly in HTML. ICO is still useful as a compatibility format because one .ico file can be used by browsers and legacy systems that expect it.
Basic website favicon usage
- Use a simple, square source image with enough contrast.
- Place favicon.ico in the site root or reference it with a rel="icon" link.
- Check the icon at small sizes before publishing.
Related converters
FAQ
- How does the online image converter work?
You upload an image, select the desired output format, and download the converted file. The process is fully automatic. - Which image formats are supported?
Supported formats include JPG (JPEG), PNG, WebP, AVIF, HEIC, TIFF, and GIF. - Is it safe to upload images?
FormatKit is designed for browser-based conversion where supported. Files are used for the requested operation and no registration is required. - Do I need to sign up?
No registration is required. Conversion is free to use.