WebP is a modern image format that provides superior lossless andlossy compression for images on the web. Using WebP, webmasters and webdevelopers can create smaller, richer images that make the web faster.

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WebP lossless images are 26% smaller in size compared to PNGs. WebPlossy images are 25-34% smaller than comparable JPEG images at equivalentSSIM quality index.

Lossless WebP supports transparency (also known as alpha channel) at acost of just 22% additional bytes. For cases when lossy RGB compressionis acceptable, lossy WebP also supports transparency, typically providing3× smaller file sizes compared to PNG.

How WebP Works

Lossy WebP compression uses predictive coding to encode an image, the samemethod used by the VP8 video codec to compress keyframes in videos. Predictivecoding uses the values in neighboring blocks of pixels to predict the valuesin a block, and then encodes only the difference.

Lossless WebP compression uses already seen image fragments in order toexactly reconstruct new pixels. It can also use a local palette if nointeresting match is found.

A WebP file consists of VP8 or VP8L image data, and a containerbased on RIFF. The standalone libwebp library serves as a referenceimplementation for the WebP specification, and is available fromour git repository or as a tarball.

WebP Support

WebP is natively supported in Google Chrome, Firefox, Edge, the Opera browser,and by many other tools and software libraries. Developers have also addedsupport to a variety of image editing tools.

WebP includes the lightweight encoding and decoding library libwebpand the command line tools cwebp and dwebp for convertingimages to and from the WebP format, as well as tools for viewing, muxing andanimating WebP images. The full source code is available on thedownload page.

WebP Converter Download

Convert your favorite collection from PNG and JPEG to WebP by downloading theprecompiled cwebp conversion tool for Linux, Windows or Mac OS X.

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