Supported output image formats
The JPEG compression format is suitable for delivering photographic images with minimal quality loss and a high compression rate. You can either choose the compression factor yourself or use Optipress - our Machine Learning algorithm, which will choose the best way to reduce JPEG file size minimizing perceptual quality loss.
This format is a good choice for non-photographic images - flowcharts, graphs, screenshots, logos, etc. PNG also supports transparency.
While the PNG format offers lossy compression only, Cloudimage can optimize the image before compression by reducing the number of colors or adding slight dithering (while preserving edges). This method usually leads to smaller file sizes for images visually indistinguishable from the original ones.
You can activate this feature in the Admin Console (Image Settings/Compression):
WebP is an image format maintained by Google and supported in certain browsers (mainly Chrome, Opera, and Chrome Android) which provides more aggressive compression techniques as JPG without noticeable quality degradation.
By default, automatic WebP transcoding is deactivated. If you choose to activate it, all images will be delivered as WebP. If the client's browser does not support this format, JPEG or PNG (if the image has an alpha channel) is used instead.
You can use the following parameters to control WebP compression quality:
By default, Cloudimage delivers the images as WebP, when the format is supported by the browser. If you would like to keep the format of the original image (when possible), you can use force_format=original.