.ICO File Extension

Icon File

The ICO file format stores icon images for programs, documents or folders on Microsoft Windows. These files contain small images at many sizes and color depths that can scale appropriately. Most newer...

General Information

Title ICO File Extension
Extension .ico
Full Form Icon File
File Type Image File
Developer Microsoft
MIME Type image/x-icon

File Function

Primary Function Contains icons
Additional Functions Store images, Multiple sizes
Features Small graphics, Identifiable symbols

File Characteristics

Quality Varying resolutions
Supports Layers No
Supports Transparency Yes
Editable Yes

Use Cases

Application Icons Yes
Favicon for Websites Yes
GUI Design Yes

Security and Practices

Security Risks Rarely targeted
Best Practices Scan for malware, Validate source

Historical/Version Information

Initial Release 1985
Latest Update Windows Vista (Introduced PNG compression)

Associated Types

Similar Extensions .png, .bmp, .gif

Software Compatibility

Software Usage Policy OS Compatibility
Microsoft Paint Free Windows
GIMP Free Windows, Mac, Linux
Adobe Photoshop Subscription Windows, Mac