Image to ICO
ImageConvert PNG, JPEG or WebP images to ICO favicon format. Multi-size ICO support (16x16 to 256x256). Download as .ico file. Client-side.
Drop image or click to upload
About Image to ICO
This image to ICO converter transforms PNG, JPEG, and WebP images into ICO icon files locally. ICO is the Windows icon format with an ICONDIR header and multiple ICONDIRENTRY entries, each embedding bitmap data at different sizes. This tool supports multi-size ICO files (16x16 to 256x256), using the Canvas 2D API to scale and encode each size into the ICO container.
How to Use
- Open the Image to ICO tool page
- Enter or paste your data into the input area
- View the real-time results and use the copy button to get the output
Use Cases
- Website favicon — Convert brand logos to multi-size ICO files as favicon.ico to enhance browser tab recognition.
- Desktop app icons — Generate multi-size ICO icons for Windows desktop applications, adapting to different display scaling levels.
- Shortcut icons — Convert custom images to ICO format for Windows desktop or folder shortcut icons.
- Browser extension icons — Generate 16x16 and 48x48 ICO icon files for Chrome or Firefox extensions.
- Brand asset output — Batch-convert brand images to ICO format for delivery to development teams for Windows applications.
FAQ
What sizes does the ICO file include?
By default it includes 16x16, 32x32, 48x48, 64x64, 128x128, and 256x256. Browsers and the system auto-select the best size for each display scenario.
Why is the generated ICO file large?
Multi-size ICO files embed bitmap data at multiple resolutions. Uncheck large size options to reduce file size if only small icons are needed.
Does it support transparent backgrounds?
Yes. PNG transparency is preserved in the ICO file. Use PNG source images for the best transparency results.
Can JPEG images be converted to ICO?
Yes. PNG, JPEG, and WebP input formats are supported. JPEG lacks an alpha channel, so the ICO background will be white.
Are images uploaded?
No. All conversion runs locally via the Canvas API; images never leave your device, safe for brand design assets.
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