WebP vs PNG vs JPG: Choosing the Right Image Format
Almost every image on the web is one of three formats. Picking the wrong one costs you page speed or image quality — sometimes both.
PNG — lossless, transparency, big
PNG compresses without throwing away data, so it is the right choice for logos, icons, screenshots, charts and anything with hard edges or transparency. It is a poor choice for photographs: a 4000×3000 photo saved as PNG can easily be 20 MB.
JPG — lossy, universal, small
JPG throws away detail the eye is unlikely to notice and gets photographs down to a fraction of their size. It has no transparency support and every re-save degrades the image slightly. Use it for photographs and complex images where universal compatibility matters.
WebP — the modern default
WebP does both lossy and lossless, supports transparency and animation, and is typically 25–35% smaller than an equivalent JPG or PNG. Every current browser (Chrome, Firefox, Safari 14+, Edge) supports it. The only real reason to avoid WebP is an old workflow that cannot handle the format.
Quick decision table
| Use case | Best format |
|---|---|
| Photograph for a website | WebP (fallback JPG) |
| Logo or icon with transparency | PNG or WebP |
| Screenshot with text | PNG |
| Email attachment for anyone | JPG |
| Printing at a lab | JPG (high quality) or TIFF |
| Animation | WebP (or GIF for compatibility) |
Converting between them
You can convert in either direction with the WebP to PNG, PNG to JPG and JPG to WebP converters. A few rules of thumb:
- Converting PNG → JPG loses transparency; the transparent areas usually become white.
- Converting JPG → PNG does not restore quality; it only makes the file bigger.
- Converting anything → WebP usually shrinks the file with no visible change.
One practical tip
Serve WebP with a JPG fallback if you support very old clients, and always set explicit width and height attributes on your images. Layout shift hurts Core Web Vitals far more than a few kilobytes of image weight.