How to convert ICNS to HEIF
To convert ICNS to HEIF, upload your ICNS file, choose HEIF as the output format and press Convert. The finished HEIF file is ready to save to your phone or computer in seconds, free, with no watermark and no sign-up. Your file is deleted from our server about 30 minutes after the conversion.
This free online converter changes ICNS images into HEIF files in seconds, with no software to install and no watermark. You can convert several files at once, resize them and choose the quality for formats that support it. Metadata such as location tags is removed from the output for privacy.
Why convert ICNS to HEIF?
- Efficient compression
- Supports image sequences and depth data
- Modern successor to JPG
- Works with: iOS, macOS, Android 10+ and recent Windows
What to expect from this conversion
- ICNS is lossless and HEIF is lossy, so the file will usually get much smaller. Use the quality slider to balance size and detail.
- Transparency is kept in the HEIF file.
- Output is HEVC-based, so check that the devices you share with can open it. If not, JPG is the safer choice.
- Browsers do not display HEIF files, so use it in editors, print workflows or development tools rather than on a web page.
ICNS vs HEIF
| Property | ICNS | HEIF |
|---|---|---|
| Full name | Apple Icon Image | High Efficiency Image File Format |
| Released | 2001, Apple | 2015, MPEG |
| Compression | Lossless | Lossy |
| Transparency | Yes | Yes |
| Animation | No | Yes |
| Bit depth | 32-bit with alpha | 8 or 10-bit |
| Shown in browsers | No | No |
| Best for | macOS app icons; Electron and Tauri builds | efficient photo storage; camera and phone workflows |
Steps to convert ICNS to HEIF
- Drop your ICNS image file onto the converter, or click to choose it.
- Check that HEIF is selected as the target and adjust the options if you want.
- Press Convert, then download your new HEIF file when it finishes.
Tips for the best result
- Use quality 80 to 90 for photos: it is visually close to the original at a much smaller size.
- Set a width if the image will be shown on a small screen, which also reduces the file size.
- Choose a background colour before converting transparent images to a format without transparency.
Frequently asked questions
How do I convert ICNS to HEIF?
Drop your ICNS files on the converter, confirm that HEIF is the target and press Convert. Download each file or the whole batch as a ZIP.
Is the ICNS to HEIF converter free?
Yes. It is free with no watermark, no sign-up and no limit on how many images you convert. The site is supported by ads.
Does converting ICNS to HEIF reduce quality?
ICNS is lossless and HEIF is lossy, so the file will usually get much smaller. Use the quality slider to balance size and detail. The quality slider only affects formats that use lossy compression.
Will transparency be kept when I convert ICNS to HEIF?
Yes. HEIF supports transparency, so transparent areas stay transparent.
Which programs open HEIF files?
HEIF files open in iOS, macOS, Android 10+ and recent Windows.
How many images can I convert at once?
Up to 20 images per batch, each up to 60 MB. Files are deleted from the server about 30 minutes after conversion.