AVIF is the most efficient image format today, based on the AV1 video codec. Files can be far smaller than JPG at the same quality (Cloudflare benchmarks put it around 50%), making it the best choice for performance-focused websites. However, AVIF isn't always ideal, especially when you need ICO.
ICO brings the advantage: Standard Windows icon & browser favicon, auto-generated at the right size.
With FORMATTO, you can convert AVIF to ICO in seconds. Everything runs 100% on your device: files are never uploaded to any server, so your privacy is guaranteed. Did you know? Cloudflare's codec benchmarks put AVIF around 50% smaller than comparable JPG, and large platforms like Netflix and YouTube have adopted the AV1 codec family.
How to convert AVIF to ICO
- 1Select or drag your AVIF files to the box above (batch supported).
- 2Adjust quality and size as needed, then click "Convert to ICO".
- 3Download results one by one or together as a ZIP. Done: no signup, no upload.
Why your files are safe
100% on device
Files never leave your device.
No trace
Close the tab, data is gone.
Free
Unlimited, no watermark.
Frequently asked questions
How to convert AVIF to ICO?
Just drag your AVIF files to the converter box above, pick your settings, then click convert. The ICO result is ready to download, all processed on your device.
Is FORMATTO really free?
Yes, 100% free with unlimited conversions. Because everything runs in your browser, we have no per-conversion server cost, so it stays free forever.
Are my AVIF files safe?
Very safe. Your files are processed directly on your device and never uploaded to a server. When the page is closed, no trace remains.
How many files can I convert at once?
You can process many files at once (batch). Download them individually or as a single ZIP.
Is AVIF supported by all browsers?
Most modern browsers already support AVIF (Chrome, Firefox, Safari 16.4+, Edge). For maximum reach, provide a WebP or JPG fallback.
Which browsers support AVIF?
Chrome, Edge, Firefox, and Safari 16+ support AVIF. Older systems and some office apps do not yet. Keep a JPG/WebP fallback for wide distribution.
Is AVIF more efficient than WebP?
Yes, typically around 20% smaller at equal visual quality per Cloudflare's benchmarks, because it is based on the AV1 codec. The trade-offs: slower encoding and narrower device support.