How to convert AVIF to ICO
- Drop your AVIF files or tap to choose them.
- Select ICO as the output and set quality if needed.
- Click Convert — processing happens on your device.
- Download each file or all of them as a ZIP.
Why convert AVIF to ICO?
AVIF is excellent for modern websites that need the smallest images, but it has some limitations:
- Limited support in older apps and Windows
- Slow to encode
- Rejected by most official forms
Converting to ICO gives you:
- Holds multiple icon sizes in one file
- Standard for favicons
- Transparency support
AVIF vs ICO: side-by-side comparison
| Feature | AVIF | ICO |
|---|---|---|
| Full name | AV1 Image File Format | Windows Icon |
| File extension | .avif | .ico |
| Type | Image | Image |
| Compression | Lossy & lossless | Lossless |
| Transparency | Yes | Yes |
| Animation / multi-frame | Yes | No |
| Introduced | 2019 | 1985 |
| Developed by | Alliance for Open Media | Microsoft |
| MIME type | image/avif | image/x-icon |
| Best for | modern websites that need the smallest images | website favicons and Windows application icons |
What are AVIF and ICO files?
AVIF (.avif)
AVIF is a next-generation image format based on the AV1 video codec. It can be up to 50% smaller than JPG at the same quality, but many apps and upload forms still cannot open it.
ICO (.ico)
ICO is the icon format used by Windows and by website favicons. One ICO file can hold several sizes (16×16 to 256×256) so the right one is shown everywhere.
Tips for the best ICO results
- Use a square source image of at least 256×256 px. The ICO file will contain 16, 32, 48, 64, 128 and 256 px versions for favicons and Windows.
- Bookmark this page or install the app to convert AVIF files offline next time.
Private by design: how this converter works
Unlike typical online converters that upload your file to a remote server, this AVIF to ICO converter processes everything on your own device using the HTML5 Canvas API and native image decoders built into your browser. Your file is read into browser memory, converted, and offered back as a download — it is never sent to us.
- No upload wait — conversion starts instantly, even on slow mobile data.
- Private — safe for NID copies, certificates, bank statements and personal photos.
- No limits — no daily quota, no queue and no watermark.
- Offline-ready — once loaded, many tools keep working without internet.
Frequently asked questions
Is this AVIF to ICO converter free?
Yes — free, unlimited and without watermarks or sign-up.
Are my AVIF files uploaded to a server?
No. Conversion happens inside your browser on your own device, so your files stay private.
Will I lose quality converting AVIF to ICO?
ICO preserves all of the original quality.
Can I convert several files at once?
Yes. Drop multiple files and download them individually or together as a ZIP.
Does it work on iPhone and Android?
Yes. It works in Chrome, Safari, Edge and Firefox on phones, tablets and computers. You can also install the site as an app.
What is the difference between AVIF and ICO?
AVIF (AV1 Image File Format) is lossy & lossless and best for modern websites that need the smallest images, while ICO (Windows Icon) is lossless and best for website favicons and Windows application icons.