Why use WebP?
WebP is an image format designed for the web. Its lossy mode usually produces smaller files than JPG at a similar visual quality, and unlike JPG it supports transparency. That makes it a strong choice for website photos, product images on transparent backgrounds and graphics that would otherwise be heavy PNGs.
All current major browsers display WebP. Some older software, email clients and upload forms still expect JPG or PNG, so check where the image is going.
How to compress an image to WebP
Upload a JPG, PNG, WebP or HEIC image. The output is always WebP. Choose By quality and adjust the slider, or choose Target size to fit a limit such as 100 KB. Around 75 to 80 percent works well for most photos.
The tool saves lossy WebP. If you upload a lossless WebP or a PNG with sharp text, compare the edges with the slider and raise the quality if you see softening. A photo is rarely improved by going above about 90 percent.
WebP and transparency
Transparent and semi-transparent pixels, such as soft shadows and anti-aliased edges, are kept in the WebP output. This is often the biggest win over PNG: a transparent product cut-out can shrink dramatically while keeping its clean edge on any background color.
WebP vs JPG vs PNG for websites
For photos, WebP is usually the smallest of the three at a similar quality, with JPG close behind and PNG far larger. For transparent images, WebP replaces PNG with a much smaller file in most cases. For flat graphics with only a few colors, a well-optimized PNG can be as small as a WebP and stays pixel-perfect, so compare both. JPG remains the safest fallback when a platform rejects WebP.