AVIF to ICO Converter
Convert AVIF to ICO free — no upload, no signup
To convert AVIF to ICO, drop your AVIF images into the box below, click Convert, then Download. Fylo does the work inside your browser, so nothing is uploaded and there's no signup or watermark. Build a favicon or Windows icon straight from an AVIF logo.
Drop images here
or tap to browse · paste with Ctrl+V · add many at once
Your files never leave your device
Advanced
Non-square images are centred on a transparent square, so nothing is cropped.
How to convert AVIF to ICO
Add your AVIF files
Drag and drop AVIF files into the box, tap to choose them, or paste with Ctrl+V. You can add many at once.
Pick icon sizes
Keep the default 16, 32, 48 and 256-pixel sizes, or choose your own under Advanced.
Convert and download
Click Convert, then download each ICO or get them all in one ZIP.
Why convert AVIF to ICO?
Brand assets exported for the web are increasingly AVIF. Converting to ICO lets you reuse them as a favicon.ico or desktop icon without opening an editor.
Does converting AVIF to ICO affect quality or size?
Fylo decodes the AVIF, keeps its transparency, and renders each icon size from the full-resolution source for the sharpest result. Images that aren't square are centred on a transparent square.
What's the difference between AVIF and ICO?
AVIF is a modern format based on the AV1 video codec. It often produces files about half the size of JPG with fewer artefacts, and supports transparency and HDR.
ICO is the Windows icon format and the classic favicon.ico. One ICO file holds several square images (16 to 256 px) so each screen can use the sharpest size.
Learn more: AVIF format guide · ICO format guide
| Property | AVIF | ICO |
|---|---|---|
| Compression | Lossy or lossless (AV1) | PNG or uncompressed bitmap entries |
| Transparency | Yes — full alpha | Yes |
| Animation | Yes | No |
| Colour depth | 8, 10 or 12-bit, HDR | Up to 32-bit + alpha |
| Typical size, 12 MP photo | ≈ 0.8–1.5 MB | Max 256 × 256 px |
| Support | Chrome 85+, Firefox 93+, Safari 16+, Edge 121+ | All browsers (favicons), Windows |
| Best for | Fast websites, hero images, photo galleries | Favicons, Windows app and shortcut icons |
| Introduced | 2019 | 1985 |
Frequently asked questions
What resolution should my AVIF source be?
At least 256 × 256 pixels and square. Smaller sources are upscaled for the 256 size and will look soft.
Does the ICO keep transparency?
Yes. Each size is stored as a PNG inside the ICO, preserving the full alpha channel.
Are my AVIF files uploaded to a server?
No. Fylo converts AVIF to ICO entirely inside your browser using a background Web Worker, so your files never leave your device. That's also why it's fast — there's no upload or download wait.
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