The 20i Web Optimisations allow you to quickly and easily optimise resources on your website to provide a better user experience and to reduce your website's loading time. One of the most popular filters is the Convert to WEBP lossless filter which converts PNG and non-animated GIF images to losslessly-encoded WebP. This happens if it's determined that the images are sensitive to compression noise and if the latter format is supported by the browser, otherwise, this filter is ignored.