To convert ICO to ICNS, choose your ICO icons above, adjust the options if needed and press "Convert to ICNS". The ICNS downloads instantly: free, with no sign-up, and the file never leaves your device.
About the ICO to ICNS Converter
Convert ICO to ICNS online for free, with no account and no watermark. ICO files only open in a handful of programs, so switching to ICNS is the quickest way to get a Retina-ready macOS icon for macOS app icons, Electron and Xcode projects and custom folder icons.
The converter decodes your ICO with your browser's own image engine and writes the ICNS with a small open-source ICNS encoder, so quality settings are applied precisely. Because everything happens on your own device, your icons are never uploaded, stored or seen by anyone else, which makes it safe for ID photos, Aadhaar or PAN scans and personal pictures.
What to expect: transparency is preserved because both ICO and ICNS support an alpha channel; ICNS stores the pixels without further quality loss; camera metadata such as GPS location is removed because the image is re-encoded.
How to use the ICO to ICNS Converter
- Click "Choose files" or drag your ICO icons onto the box. You can add several at once.
- Optionally set a background colour; all standard icon sizes are generated automatically.
- Press "Convert to ICNS". The conversion runs on your device and shows its progress.
- Download each ICNS file, or use "Download all (ZIP)" when you converted several.
- Open the result in macOS Finder or Xcode to check it; your original ICO is never changed.
Tips & benchmarks
- Use a square source of 1024×1024 px for the sharpest Retina icon; 128, 256, 512 and 1024 px sizes are included.
- Password-protected (encrypted) archives cannot be converted; extract them with the password first.
- Keep the file name simple (letters, numbers and hyphens) if you plan to upload the ICNS to a website or government portal.
Frequently asked questions
How do I convert ICO to ICNS?
Click "Choose files", select your ICO icons, adjust the options if you want, and press "Convert to ICNS". The ICNS downloads immediately; with several files you can download everything as one ZIP.
Is this ICO to ICNS converter free and safe?
Yes. It is completely free, with no sign-up, no daily limit and no watermark. The conversion runs inside your browser, so your icons never leave your phone or computer and nothing is stored on News Appite's servers.
Will converting ICO to ICNS reduce the quality?
No. ICNS stores the image without lossy compression, so the result looks exactly like your ICO.
Can I convert several ICO files at once?
Yes. Add as many ICO files as you like; they are converted one after another and you can download them individually or together as a ZIP.
Does it work on iPhone, Android and Mac?
Yes. The converter works in any modern browser, including Chrome, Safari, Edge and Firefox, on Android, iPhone, iPad, Windows, macOS and Linux. No app is needed.
What is the difference between ICO and ICNS?
ICO (Windows Icon) is a multi-size icon file best suited to website favicons, Windows shortcuts, desktop apps and folder icons. ICNS (Apple Icon Image) is a macOS icon file best suited to macOS app icons, Electron and Xcode projects and custom folder icons.
Is there a file size limit?
There is no upload limit, because nothing is uploaded. The practical limit is your device's memory: files of a few hundred megabytes work on most computers, and phones handle smaller files comfortably.
How do I convert ICO to ICNS on a Mac?
Open this page in Safari or Chrome, drop the ICO files onto the upload box and click "Convert to ICNS". It works the same on Intel and Apple silicon Macs.
ICO ko ICNS kaise kare?
Is page par "Choose files" dabaiye, apni ICO file chuniye aur "Convert to ICNS" par click kijiye. ICNS file turant download ho jaati hai. Ye bilkul free hai, sign-up nahi chahiye, aur aapki file kisi server par upload nahi hoti.
ICO vs ICNS: format comparison
| ICO | ICNS | |
|---|---|---|
| Full name | Windows Icon | Apple Icon Image |
| Type | Multi-size icon file | MacOS icon file |
| Created by | Microsoft, 1985 | Apple, 1990s |
| Compression | PNG or bitmap images inside one file | PNG images at several sizes |
| Transparency | Yes | Yes |
| File extension | .ico | .icns |
| MIME type | image/x-icon | image/icns |
| Best for | Website favicons, Windows shortcuts, desktop apps and folder icons | MacOS app icons, Electron and Xcode projects and custom folder icons |
| Opens in | Windows Explorer, every browser (as a favicon), Visual Studio and icon editors | macOS Finder, Xcode, Electron Builder and icon editors |
What is a ICO file?
ICO is the Windows icon format, and it is still the standard favicon.ico that browsers request for every website. One ICO file can hold several sizes, such as 16, 32 and 48 pixels, so the icon looks crisp everywhere.
What is a ICNS file?
ICNS is the icon format macOS uses for apps, folders and disk images. A single ICNS file bundles the same icon at several resolutions, up to 1024×1024 pixels for Retina screens.
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