PNG vs JPG: Which Is Better and When to Use Each

Use JPG for photographs. Use PNG for logos, icons, screenshots, diagrams and anything with transparency or sharp text. If you are unsure, look at the picture: lots of smooth color changes mean JPG, flat colors and hard edges mean PNG.

JPG is lossy. It throws away detail your eye is unlikely to notice, which makes photos tiny, but every save discards a little more. PNG is lossless. It keeps every pixel exactly, which is perfect for sharp graphics but makes photographs very large.

A typical phone photo might be 2 MB as a JPG and 15 MB or more as a PNG, with no visible difference on screen.

PNG supports an alpha channel, so parts of the image can be fully or partly see-through. That is what makes a logo sit cleanly on any background. JPG has no transparency at all; transparent areas become a solid color when you convert.

JPG compression works in small blocks, and around hard edges it produces faint halos and fuzz. You can notice it around text in a screenshot saved as JPG. PNG keeps those edges crisp, so screenshots, charts and UI mockups belong in PNG.

WebP can replace both: it compresses photos like JPG and supports transparency and lossless mode like PNG, usually at a smaller size. If your goal is a fast website and your audience uses current browsers, WebP is often the best answer. For everything else, the rule above still holds.

PNG to JPG makes the file much smaller and is the right move for photos saved by mistake as PNG. JPG to PNG does not restore detail that is already gone, it only wraps the same pixels in a lossless container, so only do it when a program demands PNG or you plan to edit and save repeatedly without further loss.