ICO Unpacker

Decompose icons, see every layer

Drop in a .ico file to view all embedded resolution layers and export as PNG or original BMP. A lightweight WinUI 3 desktop tool that handles BMP color depth and Alpha masks correctly.

Your ICO Files May Be Silently Corrupted

Many ICO converters silently corrupt your icons when handling BMP-format layers — losing color depth, mangling Alpha masks, and more. On the surface, the 256x256 PNG layer looks fine, but the underlying BMP may already be damaged without you ever noticing.

ICO Unpacker is a native Windows desktop tool designed specifically for decomposing ICO icon files. Drag in a .ico file to view all embedded resolution layers (16x16 to 256x256), and export them as PNG or retain the original BMP format with a single click. It correctly handles BMP color depth and Alpha masks, verifying each layer's integrity before exporting, so you can publish with confidence.

🚀 Features

• Instant Decomposition Drop in a .ico file for instant parsing — all resolution layers at a glance. No configuration needed, ready to use out of the box.
• Layer-by-Layer Preview Each layer independently displays resolution, color depth, file size, and other details to help you quickly spot issues.
• Lossless BMP Export Correctly handles BMP color depth and Alpha masks to prevent silent corruption. Supports exporting as PNG or retaining the original BMP format.
• Native Windows Experience Built on WinUI 3, seamlessly adapting to Windows light and dark themes, automatically following system settings.

🛡️ 100% Offline & Secure

ICO Unpacker runs entirely locally with no internet access and zero telemetry. Your icon files never leave your machine.

For more details, please review our Privacy Policy and Terms of Use.

📦 How to Use

1. Launch ICO Unpacker and drag in a .ico file.
2. Browse all embedded resolution layers with details — resolution, color depth, format, and file size.
3. Select layers and export as PNG or retain the original BMP format.

🤝 Support & Feedback

ICO Unpacker is free to use with an optional Supporter Edition upgrade. If you find it useful, a positive review on the Microsoft Store would be greatly appreciated!

🛠️ Bug Reports & Feature Requests

• 🐛 Report a Bug: Found something wrong? Let us know!
• ✨ Suggest a Feature: Have an idea to make the app better? We'd love to hear it.