Convert ICNS to ICO on Mac
Convert ICNS files to ICO format on your Mac with Jollycat. Apple's icon format for macOS applications, containing multiple resolutions up to 1024x1024 for Retina displays. All processing runs locally on your Mac — no cloud processing and no uploads required for conversion.
ICNS vs ICO
| Property | ICNS | ICO |
|---|---|---|
| Type | lossless | lossless |
| Compression | PNG or JPEG 2000 embedded | PNG or BMP embedded |
| Transparency | Yes | Yes |
| Animation | No | No |
| Bit Depth | 8/32-bit | 8/32-bit |
| File Extension | .icns | .ico |
| Key Advantage | macOS standard icon format | Multiple sizes in one file |
How to Convert ICNS to ICO on Mac
Open your ICNS file
Drag and drop your .icns file onto the Jollycat icon in your macOS dock or menu bar. Jollycat instantly detects the format.
Select ICO format
Pick ICO from the list of output formats. Optionally adjust quality, resolution, or compression settings.
Convert and save
Click Convert and Jollycat processes the file instantly on your Mac. No uploads required, no waiting — everything runs locally on Apple Silicon.
When to Convert ICNS to ICO
ICO advantages
Multiple sizes in one file. Windows standard.
ICNS limitations
macOS-only format. Limited to icon use.
Common use cases
Windows app icons, Website favicons, Desktop shortcuts.
ICNS to ICO Conversion Tips
ICO files contain multiple PNG or BMP images at different sizes, allowing the OS to select the appropriate size.
Frequently Asked Questions
Is the ICNS to ICO conversion free?
Jollycat is a one-time purchase for $9.99. Once purchased, you can convert ICNS to ICO and use all 1,650+ conversion paths with no limits.
Does converting ICNS to ICO require an internet connection?
No. Jollycat processes everything locally on your Mac. Your ICNS files never leave your device — all conversion happens offline using Apple Silicon.
Can I batch convert multiple ICNS files to ICO?
Yes. Drag multiple ICNS files onto Jollycat and convert them all to ICO at once. Batch processing is built in.
Ready to Convert ICNS to ICO?
Jollycat handles ICNS to ICO conversion and 1,650+ other format conversions. All offline on your Mac.
Get Jollycat for Mac