HEIC is an image format introduced in 2015 and adopted by Apple in iOS 11 (2017). It's commonly used for iPhone photos, Apple ecosystem.

Will converting HEIC to ICO reduce quality?

No further quality loss occurs. HEIC already lost detail during its original compression, but converting to lossless ICO prevents any additional degradation.

How much larger will the ICO file be?

Typically 3-5x larger than the original HEIC, since ICO preserves all pixel data without compression.

Is this conversion reversible?

Yes — HEIC and ICO are both lossless, so you can convert back and forth without quality loss.

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Convert HEIC to ICO

HEIC to ICO

ICO to HEIC

Convert HEIC images to ICO for free. Preserve full quality. No signup, instant download.

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About HEIC to ICO conversion

HEIC is introduced in 2015 and adopted by Apple in iOS 11 (2017) and is the default on every modern iPhone for iPhone photos, Apple ecosystem. ICO was created by Microsoft in 1985 and is best for website favicons, Windows desktop icons. Converting HEIC to ICO preserves every pixel without compression artifacts — ideal when you need to edit or archive the image. HEIC files can be a problem when their support is limited — converting to ICO solves compatibility issues.

Also available: ICO to HEIC Converter

HEIC vs ICO: at a glance

Property	HEIC	ICO
Compression	lossy	lossless
Transparency	Yes	Yes
Animation	Yes	No
Color depth	up to 16-bit	up to 32-bit (RGBA)
Created by	MPEG	Microsoft
Introduced	2015	1985
Best for	iPhone photos, Apple ecosystem	website favicons, Windows desktop icons, application shortcuts

HEIC uses lossy compression; ICO uses lossless. Converting won't restore lost detail, but it prevents further quality degradation during editing and archiving.