什么是WebP？
WebP是谷歌开发的现代图像格式，为网页图像提供优越的无损和有损压缩，生成的文件比可比的JPG或PNG文件小25-35%。
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What is it?
WebP是谷歌在2010年开发的现代图像格式，专门为网络设计。它使用源自VP8视频编码器的先进压缩技术，能够实现比JPG和PNG显著更小的文件大小，而不会造成可见的质量损失。
WebP支持有损和无损压缩，以及透明度（alpha通道）和动画 - 使其成为网页环境中JPG、PNG和GIF的多功能替代品。
Technical Specifications
Pros & Cons
Advantages
25-35% smaller than JPG at equivalent quality, and 26% smaller than PNG for lossless images.
Full alpha channel like PNG, but with much smaller file sizes.
Can replace animated GIFs with far smaller file sizes.
Supported by all modern browsers including Chrome, Firefox, Safari, and Edge.
Disadvantages
Older image editors and desktop software may not open WebP natively.
Windows and macOS require additional codecs to preview WebP in file explorers.
Designed for screens - not used in professional print workflows.
Some legacy systems and older browsers do not support it.
When to Use It
WebP是网页图像的最佳选择，尤其是在性能和加载速度至关重要的情况下。
Web Performance
Smaller images mean faster page loads and better Core Web Vitals scores.
E-commerce Images
Product photos load faster without sacrificing the visual quality shoppers expect.
Web Apps
Ideal for user-uploaded images and any web application where bandwidth matters.
Replacing GIF Animations
Animated WebP files are typically 64% smaller than equivalent GIFs.
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Is WebP better than JPG?
For web use, yes. WebP produces 25-35% smaller files at the same visual quality. However, JPG has broader software support and is still preferred for photography workflows.
Does Safari support WebP?
Yes. Safari added full WebP support in version 14 (2020). All modern browsers now support WebP.
Can WebP replace both JPG and PNG?
Yes, WebP can handle both use cases - lossy compression for photos (replacing JPG) and lossless with transparency (replacing PNG) - while producing smaller files in both cases.
How do I open a WebP file?
Most modern browsers open WebP directly. For desktop use, update your OS image viewer or use image editing software like Photoshop (with a plugin) or GIMP.
Should I convert my website images to WebP?
Yes, if web performance is a priority. Serving WebP to supporting browsers and JPG/PNG as a fallback for older browsers is considered best practice.