Convert ICNS to ICO
Convert ICNS to ICO online: the largest icon in the set decoded at its native size, saved as a 256 × 256 ICO icon. Free, no sign-up.
Drop your ICNS files here
Up to 50MB per file.
Conversion Settings
Files are encrypted and auto-deleted after conversion
How to Convert
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Upload your ICNS files
Drag and drop or select ICNS files from your device. You can upload multiple files at once.
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Configure Output
Choose any available ICO output options, then start the conversion.
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Download ICO files
Once conversion finishes, download your files individually or as a compressed ZIP archive.
Why convert ICNS to ICO?
ICNS is Apple's icon container for macOS apps, folders and documents, bundling the same icon at several sizes from 16 up to 1024 pixels. The converter picks the largest icon stored in the file, including Retina @2x versions, and renders that single image at its native size.
ICO output is a 256 × 256 pixel Windows icon: the image is scaled to fit with its proportions kept, and the surrounding space is transparent.
Frequently Asked Questions
How do I convert ICNS to ICO?
Drop your ICNS file above and press Convert. Our servers read every icon element in the ICNS file, decode the largest one to PNG, then encode it in the format you chose. The result is saved as a 256 × 256 ICO icon, ready to download.
Which icon size from the ICNS set is used for the ICO?
The largest one in the file. A modern ICNS usually holds a 1024 × 1024 Retina icon, and that is the image the ICO is made from.
Can classic ICNS icons without PNG data become a ICO?
Yes. Alongside PNG and JPEG 2000 icon elements, the decoder reads the classic packed RGB icons at 16, 32, 48 and 128 pixels together with their 8-bit transparency masks.
Which part of the ICNS becomes the ICO icon?
The whole image is used, fitted inside the 256 × 256 square with its proportions kept and a transparent surround.
What size is the ICO made from a ICNS file?
The icon is 256 × 256 pixels, the largest standard Windows icon size. The image is fitted inside the square with its proportions kept and a transparent surround, stored as a PNG-compressed icon.
Is my .icns file kept private?
Your file is uploaded over an encrypted connection, converted on our servers and deleted automatically within 24 hours. We never read, share or keep your files, and no account is needed.