PNG to JPG

When converting to JPG makes sense

JPG was designed for photographs. Smooth gradients, skin and skies compress beautifully, and a photo stored as PNG can often shrink by 80 or 90 percent when saved as JPG with no difference you would notice. That makes PNG to JPG worthwhile when:

• a phone, scanner or app saved a photo as PNG and the file is huge;
• an upload form or email system only accepts JPG;
• you are sending lots of photos and want the total size down.

It is a poor fit for screenshots, charts, logos and anything with crisp text. JPG smears hard edges and adds faint noise around letters. For those, keep the PNG, or compress it losslessly instead.

What happens to transparency

JPG has no transparent pixels. When a PNG with a see-through background is converted here, the transparent parts are filled with white, which suits most documents and white web pages. A cut-out logo will end up on a white rectangle. If you need it to sit on a coloured background, keep it as PNG or WebP, which both support transparency.

Picking a quality value

The quality slider runs from 40 to 100. For sharing and the web, 75 to 85 is a sensible range. For prints or images you will edit again, use 90 or more. Quality 100 is rarely worth it: the file gets much larger for detail nobody can see.

The encoder is MozJPEG, which squeezes out more than the basic JPG export in most apps at the same visual quality.

Compared to other converters

Plenty of free PNG to JPG pages exist. Prefer ones that process in the browser and say what happens to transparency. We ranked five no-upload options—with Mewix first for MozJPEG quality control—in Top 5 free PNG to JPG converters.

Questions