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File Format

What Is WebP?

WebP is a modern image format developed by Google that provides superior lossy and lossless compression for images on the web.

WebP explained

WebP is an image format introduced by Google in 2010, based on the VP8 video codec. It supports both lossy compression (like JPG) and lossless compression (like PNG), as well as transparency and animation — making it a versatile replacement for multiple legacy formats. WebP typically produces files 25-35% smaller than equivalent JPGs and up to 26% smaller than PNGs, with no perceptible loss in quality. Browser support is now near-universal, covering Chrome, Firefox, Safari, and Edge, which makes WebP the go-to format for web performance optimization.

Key points

Supports both lossy and lossless compression in a single format
25-35% smaller than JPG at equivalent visual quality
Supports transparency (alpha channel) like PNG
Supports animation, serving as a modern alternative to GIF
Near-universal browser support since 2020
Based on VP8 video codec technology by Google

Real-world examples

Converting product photos from JPG to WebP to speed up an e-commerce site by 30%
Replacing PNG logos with lossless WebP to cut page weight without losing transparency
Using animated WebP instead of GIF for smaller, higher-quality animations

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Related terms

File Format
AVIF

AVIF is a next-generation image format based on the AV1 video codec, offering the best compression efficiency available today while being royalty-free.

Concept
Lossy Compression

Lossy compression reduces file size by permanently discarding data deemed less perceptible, trading some quality for significantly smaller files.

Concept
Lossless Compression

Lossless compression reduces file size without discarding any data, allowing the original file to be perfectly reconstructed from the compressed version.

Concept
Image Transparency

Image transparency allows parts of an image to be fully or partially see-through using an alpha channel, essential for overlays and compositing.