ICO Analyzer Pro: Free Favicon Inspector & Icon File Viewer

Analyze, preview, and extract every layer inside your .ICO files instantly.

ICO Analyzer is a fast, browser-based tool designed for developers and designers who need deep insight into Windows icon files. Simply upload any.icofile and get a complete breakdown of its structure, quality, and compatibility in seconds.

Unlike basic viewers, this tool goes beyond previews, giving you a full technical analysis of every embedded icon layer, along with actionable quality insights.

What you can do

• Upload and inspect ICO files with zero setup
• Preview all icon layers (16×16 up to 256×256 and beyond)
• Extract individual icons as PNG files
• Analyze bit depth, formats, and transparency
• Check Windows compatibility and size coverage
• Get a quality score with optimization insights

ICO files are essentially containers with multiple image sizes and formats bundled together; this tool helps you break that complexity down into something clear and usable.

Why it’s useful

Whether you're building a favicon, packaging an app icon, or debugging display issues, ICO Analyzer gives you instant clarity on what’s inside your file, and what might be missing.

It helps you:

• Ensure perfect scaling across devices
• Detect missing icon sizes or low-quality layers
• Verify transparency and color depth
• Optimize icons for modern Windows compatibility

Smart insights, not just data

Beyond raw analysis, the tool evaluates your icon file using factors like size coverage, format efficiency, and color depth to generate a quality score, helping you quickly identify issues and improve your assets.

Key highlights

• 100% free and browser-based
• No installs required
• Clean, visual interface for quick inspection
• Built for developers, designers, and indie makers