Inspect ICO icon layers, dimensions, bit depth, transparency, and compatibility for Windows and web use.
ICO files contain multiple images at different sizes. Windows automatically selects the best size for each context (taskbar, desktop, etc.).
Modern ICO files can use PNG compression for larger sizes (48px+), reducing file size significantly while maintaining quality.
32-bit icons support full alpha transparency, allowing smooth edges and shadows that blend with any background.
Browser tabs, small taskbar icons, and context menus. Essential for web favicons.
Windows taskbar, desktop shortcuts, and standard displays.
Windows desktop icons and larger UI elements.
Windows Vista+ high-DPI displays and large icon views. Use PNG format.
Pro tip: Use our Favicon Generator to create ICO files with all recommended sizes automatically.
ICO is a container format that stores multiple images at different sizes and color depths. It's the standard icon format for Windows applications and web favicons.
Windows and browsers display icons at different sizes depending on context. Having multiple sizes ensures your icon looks crisp everywhere - from tiny browser tabs to large desktop views.
The quality score evaluates your ICO based on size coverage, format efficiency, and transparency support. Higher scores indicate better compatibility across Windows versions and browsers.
Yes, all uploaded files are automatically deleted from our servers within one hour. We do not store, share, or analyze your files beyond providing the analysis results you see on screen.