There are four formats worth knowing for everyday images. Here’s the short version.
JPG — photos, maximum compatibility
Great for photographs, opens everywhere, but lossy and no transparency. Use it when compatibility matters more than size.
PNG — graphics and transparency
Lossless with an alpha channel. Perfect for logos, screenshots, and anything with sharp edges or transparency — but files are large for photos.
WebP — the modern default
Smaller than both JPG and PNG at similar quality, supports transparency and animation, and is supported by every current browser. A great default for the web.
AVIF — smallest files, newest
Often 30–50% smaller than WebP at the same quality. Support is now broad. Use it when size is critical and you don’t need to support very old software.
Convert in seconds
You can move between all four with the image converter — locally, full quality, no upload.