AVIF is a newer, highly efficient format — excellent compression, but still inconsistently supported by older software. Converting to ICO happens instantly, right in your browser. The output is a single-size icon file — ideal for favicons or small app icons, not a general photo format.
AVIF delivers excellent compression, but not every tool, printer, or older device can open it yet. Converting to ICO gets you a properly formatted icon file for a website or app — done instantly, for free, without installing anything or creating an account.
Quick verdict: Pick AVIF for next-gen web images, smallest file sizes, ICO for favicons, Windows application icons.
.avif.icoimage/avifimage/x-iconConverting your AVIF file to ICO happens in three steps, entirely on your device: your browser reads the AVIF file into memory, decodes and re-encodes it as ICO using built-in browser technology (Canvas and WebAssembly), and hands you the finished file as a direct download.
At no point does the file get sent to a server. There’s no upload step to intercept, no account that could be breached, and nothing stored after you close the tab — the conversion simply couldn’t leak your file even if something went wrong, because it never left your browser in the first place.
The output is a single-size icon file — ideal for favicons or small app icons, not a general photo format.
AVIF is a newer, highly efficient format — excellent compression, but still inconsistently supported by older software.
We decode the original AVIF data and re-encode it at high quality, so any difference is minimal to the eye for normal use.
Drop your AVIF file into the box above and press Convert — the ICO download is ready in seconds, with no account, no watermark, and no limit on how many files you convert.
Yes — drop in as many files as you need, convert them all in one go, and download everything together as a single ZIP instead of clicking download on each file individually.