How Did Google's On2 Acquisition Shape WebP?

Google’s 2010 acquisition of On2 Technologies provided the core compression architecture that made WebP possible. By acquiring On2’s proprietary video technology—specifically the VP8 codec—Google repurposed its intra-frame prediction algorithms into a lightweight, standalone image format designed to accelerate the web. Without On2’s engineering foundations and Google’s subsequent decision to release the intellectual property under open-source licenses, the WebP format would not exist in its current form.

The Strategic Acquisition of On2 Technologies

In February 2010, Google finalized its acquisition of On2 Technologies for approximately $124 million. On2 had spent nearly two decades pioneering digital video compression, producing proprietary codecs such as VP6, VP7, and VP8. While Google’s immediate public priority was addressing web video streaming through YouTube and open-source HTML5 video standards (which led to the WebM project), On2’s underlying compression algorithms held broader utility across digital media.

Repurposing VP8 Intra-Frame Encoding

Video compression codecs rely on two primary forms of data reduction: inter-frame prediction (compressing changes across successive video frames) and intra-frame prediction (compressing spatial redundancies within a single standalone frame).

On2’s VP8 codec featured an intra-frame compression pipeline that split images into sub-blocks and predicted pixel values using adjacent blocks before encoding the difference. Google engineers recognized that an isolated VP8 keyframe was essentially an efficient still image. By stripping away temporal motion-estimation layers, Google adapted VP8's spatial intra-coding engine to compress static photographs.

The Birth of WebP and the RIFF Container

In September 2010, seven months after completing the On2 purchase, Google announced the WebP format. The initial lossy implementation wrapped VP8 keyframe bitstreams inside a Resource Interchange File Format (RIFF) container.

This architecture delivered file sizes roughly 25% to 34% smaller than equivalent JPEG files without noticeable degradation in visual quality. Because the intellectual property belonged entirely to Google following the buyout, the company avoided the restrictive licensing fees, patent pools, and royalty constraints that historically plagued modern image formats.

Legacy and Evolution

While WebP later expanded to include proprietary lossless compression and animation mechanisms beyond original VP8 specifications, On2’s codec served as the catalyst. The acquisition gave Google the baseline patents, algorithmic frameworks, and signal-processing expertise required to deliver a modern raster image standard natively supported across the web.