HEIF to ICO Converter
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Supports: HEIF
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Turn an Apple HEIF/HEIC photo into a Windows .ico icon for an app, desktop shortcut, or favicon. ICO maxes out at 256×256 pixels, so a full-resolution HEIF photo is downscaled hard to icon size — this is the right tool for making an icon from an image, not for keeping a viewable photo. If you just want the picture in a portable format instead, convert HEIF to PNG or HEIF to JPG.
How to Convert HEIF to ICO
- Upload Your HEIF File: Drag and drop your
.heifor.heicfile onto the page, or click "+ Add Files" to pick it from your computer. - Set the Icon Resolution: Open Advanced Options and choose a preset under Image resolution — 256P for modern high-DPI icons, or 16P / 32P / 48P for small toolbar and taskbar sizes.
- Adjust Bit Depth and Colors (Optional): Use Bit Depth (32-bit keeps the alpha channel for transparent edges) and the Colors palette if you need a smaller, legacy-compatible icon.
- Convert and Download: Click "Convert" and download your
.icofile. No sign-up, no watermark.
HEIF vs ICO at a Glance
| Property | HEIF | ICO |
|---|---|---|
| Purpose | Efficient photo storage | Windows icons / favicons |
| Standardized by | MPEG (ISO/IEC 23008-12) | Microsoft (since Windows 1.0, 1985) |
| Max dimensions | Effectively unlimited | 256×256 pixels |
| Color depth | Up to 10/12-bit, wide gamut | 4 / 8 / 24 / 32-bit |
| Transparency | Alpha supported | 32-bit alpha (Windows XP+) |
| Multiple images in one file | Bursts, depth maps, thumbnails | Several sizes/depths in one file |
| Best for | Storing iPhone/Mac photos | App, shortcut, and favicon icons |
A single .ico can bundle several sizes — for example 16×16, 32×32, 48×48, and 256×256 — so Windows can pick the right one per context. Since Windows Vista, the 256×256 entry is usually stored as embedded PNG to keep the file small.
Frequently Asked Questions
Why is my ICO so much lower resolution than the original photo?
ICO tops out at 256×256 pixels, so a multi-megapixel HEIF photo has to be downscaled to icon dimensions. That is expected for an icon format — most fine detail is discarded because an icon is only ever displayed small. If you want to keep the picture viewable at full size, convert to PNG or JPG instead of ICO.
Will the converted icon keep transparent edges?
Yes, if you keep Bit Depth at 32-bit. ICO supports a full 8-bit alpha channel (since Windows XP), which preserves transparency and anti-aliased edges from a HEIF image that has an alpha channel. Lower bit depths drop transparency in exchange for a smaller, more legacy-compatible file.
Which icon size should I pick for a favicon?
A 32×32 (32P) entry covers most browser tabs and bookmarks, and a 16×16 (16P) entry is still used in some toolbars. For a single favicon that scales cleanly across devices, 256P is a safe high-DPI choice. In our testing, a square HEIF source converted at 256P produced a .ico of a few kilobytes — small enough to drop straight into a site root.
How do I open or view an ICO file?
On Windows, .ico files preview in File Explorer and open in Paint, GIMP, or IrfanView. On macOS, Preview can display them. Browsers read .ico directly when it is referenced as a favicon, so you usually do not need to "open" it at all — just place it in your project.
Is the conversion private, and how long are my files kept?
Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours. There is no sign-up and no watermark, and your files are never shared or made public.