JPG vs PNG: Which Format Should You Use?

If you've ever saved an image and been asked to choose between JPG and PNG without really knowing why it mattered, you're not alone. The two formats solve different problems, though, and picking the wrong one is the most common reason a logo looks blurry or a photo takes forever to load.

The core difference: lossy vs lossless

JPG uses lossy compression. To shrink a file, it identifies visual information the human eye is unlikely to notice — subtle color gradients, fine texture — and discards it permanently. The more you compress, the more it discards, and at high compression you'll start to see blocky artifacts around sharp edges. This trade-off is why JPG has been the default photo format on the web for three decades.

PNG uses lossless compression instead. It repacks the exact pixel data more efficiently, without throwing anything away. Open a PNG, edit it, save it again a hundred times, and it will never degrade. The cost is size: a PNG of a detailed photo can be several times larger than the same photo saved as JPG.

Transparency is PNG's other advantage

PNG supports an alpha channel, which lets parts of an image be fully or partially see-through. This is why every logo you've ever downloaded with a "transparent background" is a PNG (or increasingly, WebP) — JPG has no mechanism for transparency at all.

A simple rule of thumb

• Photographs, gradients, complex color → JPG. Smaller files, invisible quality loss at reasonable settings.
• Logos, icons, text, screenshots, anything with transparency → PNG. Sharp edges stay sharp, and transparency is preserved.
• A file you'll edit repeatedly before it's finished → PNG, then export to JPG only at the very end.

Converting between the two

Converting a JPG to PNG doesn't recover any detail already lost to JPG compression — it simply stops further loss from that point forward. Converting a PNG to JPG is where most of the size savings happen; just remember any transparent areas will be filled in solid white, since JPG can't represent them. Both conversions take a few seconds with our JPG to PNG and PNG to JPG tools — everything happens locally in your browser.