Graphics Formats for the Web

PNG
Portable Network Graphic
.png
JPEG
Joint Photographic Experts Group
.jpeg or .jpg
SVG
Scalable Vector Graphic
.svg and .svgz
WebP
WebP is a modern image format that provides superior lossless and lossy compression for images on the web. Using WebP, webmasters and web developers can create smaller, richer images that make the web faster.
.webp
GIF
Graphics Interchange Format
.gif

Other formats

Image formats you might encounter, but aren't super-relevant for the web: