Why not just use WebP as the favicon?

Some older clients and tooling still expect ICO or PNG. Shipping both a modern PNG/SVG set and an ICO is still common.

Yes, when the WebP file includes an alpha channel.

What sizes are packed?

16×16 and 32×32 PNG frames inside one .ico.

ToolsWebP to ICO

WebP to ICO converter

WebP is common from design tools and CDNs, but many sites still ship a classic favicon.ico. Upload a WebP, keep transparency when the source has it, and download an ICO with 16×16 and 32×32 frames.

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Browser support for decode

Conversion uses your browser’s WebP decoder. Current Chrome, Firefox, Safari, and Edge all handle WebP; very old browsers may fail to load the file.

Alpha

Lossy or lossless WebP with an alpha channel keeps transparent regions when we rasterize and pack the ICO.

FAQ

Why not just use WebP as the favicon?: Some older clients and tooling still expect ICO or PNG. Shipping both a modern PNG/SVG set and an ICO is still common.
Is WebP alpha kept?: Yes, when the WebP file includes an alpha channel.
What sizes are packed?: 16×16 and 32×32 PNG frames inside one .ico.

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