Convert PNG to JPG

PNG is lossless: it reproduces the original pixel for pixel, and it supports transparency. That makes it right for logos, icons, screenshots, charts, diagrams and anything with hard edges or large flat areas of color, where lossy compression leaves visible fringing.

JPG is lossy: it discards detail the eye is least likely to miss. On photographs the result is indistinguishable at normal size and far smaller. On flat graphics and text it is the opposite — the artefacts are exactly where you look.

So converting a photograph from PNG to JPG is almost always the right call. Converting a screenshot of text, a logo or a line chart usually is not: keep it as a PNG, or use WEBP if you need it smaller and still sharp.

JPG has no alpha channel — it cannot record which pixels are see-through. When a transparent PNG is converted, the transparent areas are filled with white.

If transparency matters, convert to WEBP instead. It keeps the alpha channel, is read by every current browser, and produces a file smaller than either the PNG or the JPG.

For a photograph, expect a JPG somewhere between a fifth and a third of the PNG's size. For a screenshot or a flat graphic the saving is smaller and the quality cost is larger, which is the trade-off to weigh before converting.

If the JPG is still bigger than you need, compress it or resize it. Reducing the dimensions usually removes far more weight than any quality setting will.