About the ICO file format
Windows Icon (ICO) is a digital image format supported by heic.now conversion workflows.
The guide and converter lists are generated from the live HEIC.now catalog, so every conversion shown here is an available workflow.
Why ICO files are used
Windows Icon files belong to the raster images family and use the .ico extension.
The most practical format depends on the software, quality, compatibility and file-size requirements of the destination workflow.
What to know about ICO
File structure
ICO has format-specific rules for storing image, document or media data.
Quality
Conversion can change compression, colour, metadata, resolution or editability.
Compatibility
Support for ICO varies between browsers, operating systems and editing applications.
Original files
Keep the original ICO when future editing or maximum retained information matters.
How ICO conversion works
Converting ICO decodes or renders the source and then encodes the result in the selected destination format.
Review the converted file before replacing the source because format-specific features may not transfer.
heic.now accepts ICO as an input and can also create ICO output.
ICO compatibility and software support
Check that the receiving browser, app or service supports ICO before choosing it for delivery.
A JPG or PNG copy is often useful when broad image compatibility is the priority.
ICO and related formats
When should you use ICO?
- Sharing: Create a file the recipient can open without specialist software.
- Publishing: Prepare content for a website, app or content-management system.
- Editing: Move content into a format supported by the next editing application.
- Archiving: Keep the original and create practical access copies for everyday use.
Convert from ICO
Use ICO as the source.
Convert to ICO
Create ICO output.
ICO file format FAQ
What is a ICO file?
Windows Icon (ICO) is a digital image format supported by heic.now conversion workflows.
Can HEIC.now convert ICO files?
heic.now accepts ICO as an input and can also create ICO output.
What changes when ICO is converted?
Converting ICO decodes or renders the source and then encodes the result in the selected destination format.
Should I keep the original ICO file?
Review the converted file before replacing the source because format-specific features may not transfer.