Convert ICNS to HEIC
Convert ICNS to HEIC online: the largest icon in the set decoded at its native size, saved as a HEIC image. 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 HEIC output options, then start the conversion.
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Download HEIC files
Once conversion finishes, download your files individually or as a compressed ZIP archive.
Why convert ICNS to HEIC?
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.
HEIC uses High Efficiency Image Coding, the format iPhones and iPads save photos in, so the image is compact while staying sharp.
Frequently Asked Questions
How do I convert ICNS to HEIC?
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 HEIC image, ready to download.
Which icon size from the ICNS set is used for the HEIC?
The largest one in the file. A modern ICNS usually holds a 1024 × 1024 Retina icon, and that is the image the HEIC is made from.
Can classic ICNS icons without PNG data become a HEIC?
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.
How big is the HEIC image from a ICNS file?
The largest image stored in the icon set is used, so the HEIC is as detailed as the icon allows.
How compact is the HEIC made from a ICNS file?
HEIC uses High Efficiency Image Coding, which typically needs about half the space of a JPG of similar quality, so even detailed pages stay small.
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.