ICNS

Writable

image

The Apple Icon Image Format is the icon format used by Apple's Mac family of Operating Systems.

Identify it

Extensions	`.icns`
MIME types	`image/x-icns`
Signatures	`69636e73` at byte 0 (Apple Icon Image Format)
PRONOM	`fmt/1185`
Wikidata	`Q2858737`

Not sure your file is this? Identify it from its first bytes, in your browser.

Kreative Structured Format LibraryOpen sourcereads and writes · Mozilla Public License
AbydosOpen sourcereads · GNU Lesser General Public License
Apache TikaOpen sourcereads · Apache Software License 2.0
DevILOpen sourcereads · GNU Lesser General Public License, version 2.1
imageioOpen sourcereads · 2-clause BSD License
PhotoRecOpen sourcereads · GNU General Public License
Mathematicawrites · proprietary license
Icon Composerreads
Quick Lookreads

No conversion recorded. One of the tools above may export it; search for a chain.

From Just Solve the File Format Problem (File Formats Wiki), PRONOM, Wikidata. Updated 2026-10-24.