How to Convert PNG to JPG
Converting a PNG to JPG is usually about file size — PNGs can be considerably larger than an equivalent JPG, especially for photographs, and that size difference matters when you're uploading, emailing, or trying to keep a website fast. It's a quick conversion, with one tradeoff worth understanding before you do it.
The tradeoff: no more transparency
JPG doesn't support transparency at all, so converting a PNG with a transparent background to JPG fills that transparent area with a solid color (almost always white) instead. This is fine for a PNG that never actually used transparency — a screenshot or a photo saved as PNG, for instance — but it will visibly change a logo or icon that relies on a see-through background, since that transparency simply can't exist in a JPG.
Why the file size drops so much
PNG is lossless, meaning it preserves every pixel exactly, which is precise but expensive in file size. JPG uses lossy compression, discarding some visual detail (in a way that's largely imperceptible at higher quality settings) in exchange for a much smaller file. For photographs specifically, this trade is usually a clear win — the human eye doesn't notice the difference at normal viewing sizes, but the file size difference is substantial.
When PNG is genuinely the better choice to keep
Screenshots, graphics with sharp text or clean lines, and anything with a transparent background are better left as PNG — JPG's compression tends to blur fine edges and introduce visible artifacts around sharp text, which is exactly the kind of image PNG handles best. Converting these to JPG to save space usually isn't worth the visible quality loss.
Choosing a quality setting
Most converters let you set a JPG quality level — higher quality means larger files with less visible compression, lower quality means smaller files with more visible artifacts. For most photos, a quality setting in the 75–85% range is a reasonable default: meaningfully smaller than the source PNG, with compression artifacts that are hard to spot at normal viewing size.
PNG to JPG handles this conversion directly in your browser with adjustable quality. If file size is the main goal and you want to keep the PNG format, Compress Image can shrink a PNG without converting it at all. For other format pairs, the image converter covers the rest.