Home Conversions Features Pricing Get Jollycat

Convert ICNS to AVIF on Mac

Convert ICNS files to AVIF 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.

Jollycat converts ICNS to AVIF instantly on your Mac. 100% offline, no uploads required.

Get Jollycat

ICNS vs AVIF

PropertyICNSAVIF
Typelosslessboth
CompressionPNG or JPEG 2000 embeddedAV1-based lossy/lossless
TransparencyYesYes
AnimationNoYes
Bit Depth8/32-bit8/10/12-bit
File Extension.icns.avif
Key AdvantagemacOS standard icon formatBest compression ratio available

How to Convert ICNS to AVIF on Mac

1

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.

2

Select AVIF format

Pick AVIF from the list of output formats. Optionally adjust quality, resolution, or compression settings.

3

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 AVIF

AVIF advantages

Best compression ratio available. HDR and wide color gamut.

ICNS limitations

macOS-only format. Limited to icon use.

Common use cases

Next-gen web images, HDR photography, Bandwidth optimization.

ICNS to AVIF Conversion Tips

*

AVIF uses AV1 intra-frame coding, typically 20% smaller than WebP and 50% smaller than JPEG.

Frequently Asked Questions

Is the ICNS to AVIF conversion free?

Jollycat is a one-time purchase for $9.99. Once purchased, you can convert ICNS to AVIF and use all 1,650+ conversion paths with no limits.

Does converting ICNS to AVIF 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 AVIF?

Yes. Drag multiple ICNS files onto Jollycat and convert them all to AVIF at once. Batch processing is built in.

Ready to Convert ICNS to AVIF?

Jollycat handles ICNS to AVIF conversion and 1,650+ other format conversions. All offline on your Mac.

Get Jollycat for Mac
Apple Silicon macOS 12+