ICO Viewer Online — Free Multi-Resolution Icon & BMP Inspector | Online Gallery
Inspect multi-size ICO resolutions & bitmaps with PNG export. Unpack Windows icon packages (.ico) into all embedded sub-resolutions (16x16 to 256x256), view transparency, and export PNGs.
What is ICO Icon Viewer and what does it do?
The BMP & ICO Multi-Resolution Icon Viewer unpacks Windows icon bundles into all embedded resolutions with transparency.
- Extract 16x16, 32x32, 48x48, 64x64, 128x128, and 256x256 sub-icons.
- Inspect transparency grid and color depths.
- Export any sub-resolution directly as PNG.
How does ICO Icon Viewer work?
Reads binary ICONDIR headers, parses individual icon directory entries, and renders DIB and PNG frames.
100% private: all processing happens locally in your browser using client-side WebAssembly, WebCrypto, WebAudio, and HTML5 Canvas. Your files are never uploaded to any server.
Who needs ICO Icon Viewer?
UI Designers & Web Developers
Extract favicon sizes and application icons from legacy Windows .ico files.
Supported file formats
BMP & ICO Multi-Resolution Icon Viewer (.ico, .bmp) opens and processes the following file extensions directly in your browser:
.ico.cur.bmpHow to use ICO Icon Viewer — step by step
- 1
Drop Icon File
Select your .ico, .cur, or .bmp image.
- 2
Browse Resolutions
Select any sub-size (16x16, 32x32, 48x48, 64x64, 128x128, 256x256).
- 3
Export Individual PNG
Download any extracted resolution with transparency intact.
Frequently asked questions
Does it extract PNGs embedded in ICO files?
Yes, both legacy DIB bitmapped icons and modern PNG-compressed 256x256 icons are decoded.
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