What is WebP?
WebP is a modern image format from Google that supports both lossy and lossless compression plus alpha transparency and animation, typically producing 25-35% smaller files than PNG or JPEG at equivalent visual quality. Browser support is now near-universal, which is why it has become a default recommendation for web image delivery.
Example
A 200 KB PNG icon set often shrinks to under 130 KB as WebP with no visible quality loss.
Related tool
Try it on ToolSphere — runs entirely in your browser, nothing is uploaded to a server.