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WebPA bitmapped graphics file format from Google that was introduced in 2010. WebP is the still image counterpart to Google's WebM video format and was derived from the same sources. Designed as a single format that can be used in place of JPEG, GIF and PNG, WebP images can be lossy like JPEG or lossless like GIF and PNG. WebP supports 24-bit color and an 8-bit alpha channel for transparency.
Like animated GIFs, animated WebP is a sequence of still frames; however, animated WebP can combine lossy and lossless frames, and the format's meta-data defines the transparency of each frame. See animated GIF, GIF, JPEG, PNG and WebM.