Convert ICO to HEIC
ICO to HEIC can't be done in your browser
ICO to HEIC can't be done in your browser
Creating a HEIC file needs an HEVC encoder, which no web browser includes and which can't run privately on your device the way our other conversions do. Reading HEIC works in the browser — writing it doesn't — so an honest, no-upload HEIC converter isn't possible today.
AVIF delivers the same roughly 50% size saving as HEIC, with far wider support — and it converts instantly, right in your browser.
Why convert ICO to HEIC?
HEIC is Apple's photo format, built on the modern HEVC codec — but creating a HEIC file needs an HEVC encoder, and no web browser includes one. Reading HEIC works in-browser; writing it doesn't, so a private, no-upload HEIC converter simply isn't possible today. AVIF gives you the same kind of modern, efficient compression for the image inside your ICO, fully supported on the web, and converts instantly right here.
ICO vs HEIC at a glance
ICO is the Windows icon container — bundles several sizes in one file, still the format browsers expect for favicon.ico. HEIC is Apple's default photo format — roughly half the size of JPG at the same quality, but barely supported outside Apple devices.
| Property | ICO | HEIC |
|---|---|---|
| Extension | .ico | .heic, .heif |
| Full name | Windows Icon | High Efficiency Image Format |
| First released | 1985 | 2015 |
| Developed by | Microsoft | MPEG (popularized by Apple) |
| Compression | Lossless | Lossy |
| Transparency | Yes | Yes |
| Animation | No | No |
| Best for | favicons and Windows application icons | iPhone and iPad photos — high quality at half the size of JPG |
ICO to HEIC — frequently asked questions
Why can't I convert ICO to HEIC here?
Making a HEIC file requires an HEVC encoder, which no web browser provides and which can't run privately on your device the way our other conversions do. We only build converters that work entirely in your browser with no upload — an honest in-browser HEIC encoder isn't one of them.
What should I use instead of HEIC?
AVIF. It uses the modern AV1 codec to reach a similarly small file size for the image inside your ICO, while being fully supported across browsers and the web. Convert ICO to AVIF instantly here.
Related conversions
- ICO to JPG
- ICO to PNG
- ICO to PDF
- ICO to WEBP
- ICO to AVIF
- ICO to HEIC
- ICO to GIF
- ICO to BMP
- ICO to TIFF
- ICO to PSD
Need the reverse? Convert HEIC to ICOExplore the HEIC converter