Google reports a 64% reduction in file size for images converted from animated GIFs to lossy WebP, and a 19% reduction when converted to lossless WebP. For cases when lossy RGB compression is acceptable, lossy WebP also supports transparency, typically providing three times smaller file sizes compared to PNG. Lossless WebP supports transparency, as well. WebP lossy images are often anywhere from 25-34% smaller than comparable JPEG images at equivalent SSIM (structural similarity) quality index. WebP lossless images are often at least 25% smaller in size compared to PNGs. A faster loading website is critical to the user experience and for the website's marketing effectiveness.įor optimal loading across all devices and users, images on your site should not be larger than 500 KB in file size. Using WebP, web developers can create smaller, richer images that improve site speed. WebP is an image format developed by Google in 2010 that provides superior lossless and lossy compression for images on the web.
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