About the ICO file format
Windows Icon (ICO) is a raster image format that stores a picture as a grid of pixels. Raster formats are commonly used for photographs, screenshots, web graphics, and exported artwork.
On png.now, the format guide and converter lists below are generated from the same live converter catalog. That means every conversion shown here is an available workflow involving ICO files.
Why ICO files are used
Windows Icon files store an image as a grid of pixels. They are used when a fixed-size visual must be displayed, edited, uploaded or shared consistently across devices.
The right raster format depends on the balance you need between image quality, file size, transparency, colour handling and compatibility with the destination software.
What to know about ICO
Pixel-based image
ICO stores rendered pixels, so enlarging beyond the original resolution can expose softness or pixelation.
Resolution matters
The pixel dimensions of a ICO file determine how much detail is available for screens, print and later editing.
Compression choices
Compression behaviour varies by raster format. Keep the original when a later workflow may require maximum retained detail.
Colour and metadata
Colour profiles and metadata can affect appearance and workflow even when two files have the same visible dimensions.
Transparency varies
Alpha transparency is format-dependent. Confirm that the selected output supports it before converting artwork or cut-outs.
Viewer compatibility
Browser, editor and platform support can differ, especially for newer or specialist raster formats.
How ICO conversion works
Converting ICO means decoding its pixels and encoding those pixels in the destination format. The output can preserve the visible image while changing compression, metadata, transparency or colour capabilities.
A conversion cannot recreate detail already discarded by the source. For important images, keep the original ICO file alongside any delivery copy.
png.now currently creates ICO as an output format from supported source files. This page lists 1 available conversion involving the format.
ICO compatibility and software support
Raster formats range from universally recognized photo formats to specialist imaging formats. Support should be checked in the browser, editor, content-management system or upload service that will receive the file.
When compatibility is the priority, a JPG or PNG copy is often useful. Modern formats may provide better compression or richer imaging features when every part of the workflow supports them.
Before deleting or replacing a source file, confirm that the converted format preserves the visual quality and features required by the receiving application.
ICO compared with related formats
These formats belong to the same broad format family: Raster images. The table compares their role in the current png.now converter catalog.
When should you use ICO?
- Web and app assets: Prepare a rendered image for a browser, interface, CMS or online service.
- Photography: Store or deliver continuous-tone images at an appropriate balance of quality and size.
- Editing hand-off: Create a format that the next editor or application can open reliably.
- Sharing and archiving: Make a practical copy while retaining the highest-quality original separately.
Convert ICO files on png.now
png.now currently creates ICO as an output format from supported source files. Choose a converter below based on whether you want to open a ICO source or create a ICO output.
Convert to ICO
Create a ICO file as the output.
ICO file format FAQ
What is a ICO file?
Windows Icon (ICO) is a raster image format that stores a picture as a grid of pixels. Raster formats are commonly used for photographs, screenshots, web graphics, and exported artwork.
Can png.now convert ICO files?
Yes. This page lists all 1 currently available png.now conversion that accept or create ICO files.
Which converters involve ICO?
Use the Convert from ICO and Convert to ICO sections on this page to choose an available direction.
What changes when a ICO file is converted?
Converting ICO means decoding its pixels and encoding those pixels in the destination format. The output can preserve the visible image while changing compression, metadata, transparency or colour capabilities.
Should I keep the original ICO file?
Yes, when the file matters. A converted copy can be easier to use, but it may not retain every capability, editing feature or piece of metadata available in the original ICO file.