Why convert AVIF to ICO?

Windows icons, desktop shortcuts, and browser favicons all require the .ico container — AVIF isn't accepted as a source for any of them. This turns a square AVIF into a real, multi-resolution .ico ready to use.

Can I generate a multi-size ICO?

Yes. The ICO output defaults to a multi-size package covering 16, 32, 48, 64, 128, and 256 px, or you can pick a single size from the dropdown.

Does AVIF's transparency survive in the ICO?

Yes, cleanly. Each embedded size is written as genuine PNG-compressed image data with real per-pixel alpha (ICONDIR plus one entry per size), so AVIF's alpha channel comes through intact rather than being flattened.

What happens if the source AVIF is animated?

Only the first decodable frame is used to build the icon; the rest of the animation is discarded. Most AVIF files are static single images, so this only affects the less common animated (AVIS) profile — and AVIF decoding also depends on your browser's support.

Are my files uploaded?

No. Conversion runs locally in your browser and does not upload your file to Looty Tools servers.

What is validated before conversion?

The file must actually be an AVIF — the tool checks the ISO-BMFF ftyp brand, not just the filename or extension, before decoding.

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AVIF to ICO Converter

Convert AVIF images to a Windows ICO icon directly in your browser — generate a single size or a multi-size icon package.

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AVIF to ICO processes files locally in your browser.

What AVIF to ICO conversion does

Convert an AVIF image into a Windows ICO icon directly in your browser. Neither Windows nor browsers accept AVIF as an icon or favicon source, so this decodes the AVIF and packages it into a real multi-size .ico — and because ICO stores each size as a PNG-compressed frame with genuine per-pixel alpha, AVIF's transparency comes through cleanly.

How to convert AVIF to ICO

Choose a AVIF file.
Pick a single icon size, or leave the default multi-size package selected.
Select Convert & download.
Save the .ico file from your browser downloads.

Why use this conversion

Windows icons and browser favicons both require the .ico container specifically — AVIF isn't accepted as a source for either — so this turns a square AVIF into a ready-to-use, multi-resolution icon file.

Transparency and output quality

AVIF's alpha channel survives this conversion well: each embedded ICO size keeps the source's per-pixel alpha, since every size is written as genuine PNG-compressed image data (ICONDIR plus one entry per size) rather than a stripped-down bitmap. Each icon entry uses PNG compression, so a single-size ICO stays small; the multi-size package is larger since it bundles six images at different resolutions.

Privacy and local processing

Processing occurs locally in the browser.
Files are not uploaded to Looty Tools for conversion.
Converted files remain on your device.

Limits and known issues

Input: AVIF (.avif) only, up to 25.0 MB and 8,192 px per side.
Each icon size is generated by resizing the full image to a square canvas, so a non-square source AVIF will be stretched to fit.
If the source AVIF is animated, only its first frame is used to build the icon; the rest of the animation is discarded. Most AVIF files are static, so this only affects the less common animated (AVIS) profile.
Metadata is not preserved in the downloaded file.

Related tools

Guides

AVIF to ICO FAQ

Why convert AVIF to ICO?: Windows icons, desktop shortcuts, and browser favicons all require the .ico container — AVIF isn't accepted as a source for any of them. This turns a square AVIF into a real, multi-resolution .ico ready to use.
Can I generate a multi-size ICO?: Yes. The ICO output defaults to a multi-size package covering 16, 32, 48, 64, 128, and 256 px, or you can pick a single size from the dropdown.
Does AVIF's transparency survive in the ICO?: Yes, cleanly. Each embedded size is written as genuine PNG-compressed image data with real per-pixel alpha (ICONDIR plus one entry per size), so AVIF's alpha channel comes through intact rather than being flattened.
What happens if the source AVIF is animated?: Only the first decodable frame is used to build the icon; the rest of the animation is discarded. Most AVIF files are static single images, so this only affects the less common animated (AVIS) profile — and AVIF decoding also depends on your browser's support.
Are my files uploaded?: No. Conversion runs locally in your browser and does not upload your file to Looty Tools servers.
What is validated before conversion?: The file must actually be an AVIF — the tool checks the ISO-BMFF ftyp brand, not just the filename or extension, before decoding.