Convert ICO to WebP
Convert ICO images to WebP directly in your browser. Your files are never uploaded.
What to know
ICO is lossless and WebP is lossy, so this conversion permanently discards some detail. The quality slider controls how much; 80% is usually indistinguishable from the original at normal viewing size.
An ICO file can contain several icon sizes. Browsers decode only one of them, usually the largest.
ICO is a container that holds several sizes of the same icon at once, used mainly for Windows icons and favicons.
WebP does both lossy and lossless compression and supports transparency, typically landing 25–35% smaller than a JPG of equivalent quality. Every current browser supports it.
Questions
Are my ICO files uploaded anywhere?
No. The conversion runs inside your browser using the Canvas API. The file is read into memory on your own machine and never sent over the network, which you can confirm by opening your browser's developer tools and watching the network tab stay empty.
Does converting ICO to WebP reduce quality?
WebP is a lossy format, so some detail is discarded. Use the quality control to decide how much — around 80% is normally indistinguishable from the original, while lower settings trade visible artefacts for smaller files.
Is there a file size limit?
There is no limit imposed by the tool, because there is no server to upload to. The practical ceiling is your device's available memory — very large images may be slow on an older phone.