WebP vs PNG vs JPG: which should you use?
If you've ever right-clicked "Save Image As" and noticed three different file extensions, you've run into the most common image formats on the web: JPG, PNG, and WebP. Each one was built to solve a different problem, and picking the right one can make a real difference to file size and quality.
JPG (JPEG)
JPG has been around since the early 1990s and is still the default format for photographs. It uses "lossy" compression, meaning it throws away some image data to shrink the file — usually in ways the human eye barely notices at high quality settings.
Best for: photos, complex images with lots of colors and gradients, anything where small file size matters more than pixel-perfect accuracy.
Limitation: no transparency support, and repeated editing/saving can gradually degrade quality.
PNG
PNG uses "lossless" compression — nothing is thrown away, so the image looks identical to the original no matter how many times you open and save it. It also supports transparency, which is why logos, icons, and screenshots are usually saved as PNG.
Best for: logos, icons, screenshots, graphics with text, anything needing a transparent background.
Limitation: file sizes can be significantly larger than JPG or WebP for photographic content.
WebP
WebP is a newer format developed for the web. It supports both lossy and lossless compression, plus transparency and animation — essentially combining the strengths of JPG and PNG into one format, with better compression than either.
Best for: website images of any kind, where smaller files mean faster page loads.
Limitation: while support is now nearly universal in browsers, some older software and design tools still don't open WebP files directly.
Quick decision guide
- Building a website and want fast load times? Use WebP.
- Need a logo or graphic with a transparent background for a document or app? Use PNG.
- Sharing a photo by email or to social media, or need maximum compatibility? Use JPG.
Whichever direction you need to go, you can convert between all three formats — plus BMP — for free using the SmartPic Converter tool. Everything happens in your browser, so your images are never uploaded anywhere.