ICO (.ico) Test File
image/x-icon
What is ICO?
ICO (Icon) is an image file format used for icons in Microsoft Windows. ICO files contain one or more small images at multiple sizes and color depths, allowing the operating system to select the most appropriate size for display. Common sizes include 16x16, 32x32, 48x48, and 256x256 pixels. The format supports both BMP and PNG encoded images within the same file. ICO files are primarily used for website favicons (displayed in browser tabs), application icons, and Windows shell icons. The format includes a header that specifies the number and properties of contained images, followed by the image data for each size variant.
Why Do Developers Need Test ICO Files?
Developers need test ICO files to verify favicon implementation, test icon generation tools, validate multi-resolution image handling, and ensure applications correctly create and display Windows-style icons.
Common Use Cases
- Favicon testing
- Icon generation validation
- Multi-resolution image testing
- Windows application icon testing
Frequently Asked Questions
- Is this sample ICO file safe to use?
- Yes. All files on SampleFiles are generated programmatically with safe, blank, or sample content. They contain no executable code, macros, or malicious payloads.
- What is the file size?
- The default sample file is small (under 10KB). Use our Custom Generator to create files in specific sizes up to 10MB.
- Can I use these files commercially?
- Yes. All test files are free to use for any purpose, including commercial development and testing.