ICO to HEIF Converter

ICO to HEIF Converter

ICO is Microsoft's Windows icon container — a small, square still image that can hold several sizes and supports transparency. HEIF (High Efficiency Image Format) is the MPEG still-image standard that Apple ships as HEIC, storing pictures with HEVC compression for roughly half the size of JPEG. This converter re-encodes your icon as a HEIF still. Before you do it, read the compatibility note below: HEIF is excellent for photos but a poor fit for tiny, flat icons, and it is far less portable than ICO. If you just need an icon that opens everywhere, convert ICO to PNG instead.

ICO Format at a Glance

HEIF Format at a Glance

How to Convert ICO to HEIF

1. Upload Your ICO File: Drag and drop your .ico onto the page or click "Add Files." You can queue several icons and convert them with the same settings.
2. Pick a Quality Preset: Open Advanced Options and choose a Quality Preset (Very High is the default), or switch to "Specific file size" to cap the output exactly.
3. Set Image Resolution (Optional): Keep the original icon size, or use the Image resolution controls to scale by percentage, set a width/height, or enter exact pixel dimensions.
4. Convert and Download: Click "Convert" and download your HEIF file. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours — no sign-up, no watermark.

Frequently Asked Questions

Should I really convert an icon to HEIF?

Usually not. HEIF's advantage is heavy compression of photographic detail, and an icon is tiny and flat, so there is little to compress and little to gain. HEIF is also far less portable than ICO or PNG. Convert to HEIF only if your workflow specifically targets the Apple/HEIF ecosystem; for anything else, ICO to PNG gives you a smaller, universally viewable file.

Will the HEIF file open on Windows?

Not out of the box. Windows 10 and 11 need a codec extension to display HEIF/HEIC, and Microsoft removed the free HEVC Video Extensions package in early 2023, so most users now have to buy the $0.99 HEVC Video Extensions from the Microsoft Store. Chrome, Firefox, and Edge cannot display HEIF at all. Safari 17 and later, and recent Apple devices, open it natively.

Does HEIF keep the icon's transparency?

HEIF supports an alpha channel, so transparency can be preserved during the conversion. Because transparency handling varies between HEIF encoders and viewers, check the result in your target app — if a transparent background is critical and must look identical everywhere, PNG is the safer choice.

What happens to the multiple sizes inside an ICO?

An ICO file can bundle several resolutions (16x16 through 256x256) in one container. A HEIF still holds a single image, so the conversion outputs one picture rather than a multi-size icon set. If you need a specific size, set it under Image resolution before converting.

Is HEIF the same as HEIC?

They are closely related. HEIF (ISO/IEC 23008-12) is the underlying container standard; HEIC is Apple's branding and file extension for HEIF images encoded with HEVC. In practice the two terms are used interchangeably for the still images iPhones produce, and our HEIF output uses the same HEVC payload.

Are my uploaded files kept private?

Yes. In our testing, a typical 256x256 ICO uploads and converts in a couple of seconds over an encrypted connection. The file is processed on our servers and deleted automatically after a few hours. There is no sign-up, no watermark, and files are never shared or made public. To go the other direction later, use HEIF to PNG.