HEIC (High Efficiency Image Container) uses the HEIF standard popularized by Apple for iPhone photos. It offers better compression than JPEG but is not natively supported by all browsers or Windows versions.

What sizes does the ICO contain?

The generated ICO file includes two frames: 32x32 pixels (standard desktop icon) and 16x16 pixels (taskbar and favicon size). Most browsers and operating systems will automatically pick the best size.

Is my image uploaded to a server?

No. All processing happens entirely in your browser using the Canvas API and a WebAssembly HEIC decoder. Your image never leaves your device.

Why does my browser show an error decoding the HEIC?

Some HEIC variants (e.g. HEIC with a non-standard color profile) may not be supported by the decoder. Try re-exporting the image as a standard HEIC from an iPhone or use a JPEG/PNG version instead.

Can I use the ICO as a website favicon?

Yes. The output ICO is fully compatible with the HTML tag and is readable by all major browsers and Windows Explorer.

What is the maximum file size supported?

There is no hard limit imposed by this tool, but very large HEIC files (over 20 MB) may take a few seconds to decode depending on your device speed.

HEIC to ICO Converter

Upload a HEIC or HEIF image and download a multi-size ICO file (32x32 and 16x16) instantly in your browser.

Upload HEIC / HEIF Image

Drop your HEIC/HEIF file here or click to browse

Preview & Download

Your ICO preview will appear here after conversion.

Summary

This tool converts HEIC/HEIF images — the format used by iPhones and modern cameras — into ICO files compatible with website favicons and Windows icons. Everything runs client-side using the Canvas API and a lightweight HEIC decoder, so your photos never leave your device. The output ICO contains both a 32x32 and a 16x16 icon frame for maximum compatibility.

How it works

Select or drag a HEIC or HEIF image file onto the drop zone.
The browser decodes the HEIC data using a WebAssembly-based decoder.
The decoded image is drawn onto two Canvas elements at 32x32 and 16x16 pixels.
Pixel data from both canvases is packed into a valid multi-size ICO binary.
Click "Download ICO" to save the resulting favicon-ready .ico file.

Use cases

Create a favicon from an iPhone photo without installing software.
Convert a HEIC logo or icon export to ICO for Windows app packaging.
Generate a quick site favicon from any HEIC image on the fly.
Produce a multi-resolution ICO file from a HEIF camera shot.
Prepare an icon for Electron or desktop app projects.
Batch-preview HEIC images before choosing which one to use as an icon.

Frequently Asked Questions

Last updated: 2026-06-11 · Reviewed by Nham Vu