Converting AVIF to ICO produces a Windows icon file from an AVIF source, preserving alpha and generating standard icon sizes. AVIF's precise color and sharp edges transfer cleanly into multi-resolution icons.
Drag & drop image files here, or browse
Drop your AVIF files here
The converter generates standard sizes (16, 32, 48, 256) by downscaling. AVIF's HDR or wide-gamut color gets tonemapped to the icon's 8-bit sRGB. Alpha transparency is preserved.
ICO works on every browser (for favicons), every Windows version, and every icon-aware tool.
AVIF is an image format built on the AV1 video codec, standardized in 2019. It supports HDR, wide color gamut, 12-bit depth, alpha, and animation. At matched perceived quality it's typically 50% the size of JPG and 20% smaller than WebP. Support is near-universal in modern browsers but spottier in image editors.
ICO is the Windows icon format. A single .ico file can hold multiple resolutions (16×16, 32×32, 48×48, 256×256) and color depths simultaneously, letting the OS pick the best for context. Every browser serves favicons as ICO, and Windows desktop icons use it natively.
Yes. ICO supports alpha and AVIF's transparency maps cleanly. Icons will have proper soft edges.
Standard Windows icon sizes: 16, 32, 48, and 256 pixels square.
AVIF is an image format built on the AV1 video codec, standardized in 2019. It supports HDR, wide color gamut, 12-bit depth, alpha, and animation. At matched perceived quality it's typically 50% the size of JPG and 20% smaller than WebP. Support is near-universal in modern browsers but spottier in image editors.
ICO is the Windows icon format. A single .ico file can hold multiple resolutions (16×16, 32×32, 48×48, 256×256) and color depths simultaneously, letting the OS pick the best for context. Every browser serves favicons as ICO, and Windows desktop icons use it natively.
Yes. The converter runs entirely in your browser using WebAssembly. Your images are never uploaded, never sent to a server, and never leave your device.
There's no hard limit, but because everything runs in your browser you're bounded by available memory. Very large images (over a few hundred megapixels) can hit browser memory limits. Process in smaller batches if you run into issues.