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ICO ICNS
File conversion

Convert ICO to ICNS

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Is it possible to convert ICO to ICNS?
Yes - ICO converts to ICNS.

ICNS is the macOS icon equivalent. Convert when you need a Mac app icon from a Windows one: use an icon tool or online converter that reads .ico and writes .icns (best to start from a high-res 256/512 px source). Different OS icon container, same idea.

6 programs
Also to ICNS: ICL · ICON · EXR

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Tested on macOS, Windows & Linux
Last verified Oct 2026

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How to convert ICO to ICNS

Converting a .ICO file to .ICNS lets you open the content in software that prefers the .ICNS format, though some details may change compared with the original. The programs listed below open .ICO files and can save or export them to .ICNS (or a closely related format). One of them is Axialis IconWorkshop: Axialis IconWorkshop is a professional icon creation and editing application developed by Axialis Software for Windows. It supports designing icons at multiple….

A full step-by-step guide for this conversion is on the way; the information above is drawn straight from our database.

Programs that convert ICO

Axialis IconWorkshop
IcoFX
Preview
IconBox
Icons Maker
Image2icon

About these formats

.ICO Windows Icon File

An ICO file is a Windows icon used for programs, files, folders, and browser favicons. One .ico holds the same image at several sizes (16x16 up to 256x256) so Windows picks the sharpest…

Open .ICO details →
.ICNS Apple Icon Image

An ICNS file is Apple's native icon format for macOS - it stores one icon at multiple sizes (16x16 up to 1024x1024) so the OS can display it sharply at any scale. On a Mac, double-click to…

Open .ICNS details →