WebP

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WebP is a free image file format first released by Google in 2010. It consists of 2 primary "modes" of operation. A lossy mode derived from the VP8 video codec, and a novel lossless mode added in 2011.

Encoding

Using libwebp

libwebp supports WebP, JPEG, PNG, PNM (PGM, PPM, PAM), TIFF as input formats, and a quality (-q) value between 0 (lowest quality, smallest file) and 100 (highest quality, largest file). Should you need the lossless mode, you need to instead use a -z argument, with values representing the effort used between 0 (fastest encode, largest file) and 9 (slowest encode, smallest file).

cwebp example.png -q 75 -o example.webp

decoding

dwebp example.webp -o example.png

Performance Checklist

Lossless? Yes

Lossy? Yes

Supported Bit Depth: 8 BPC

HDR/Wide Gamut? No

Animation? Yes

Transparency? Yes

Progressive Decode? No

Royalty Free? Yes