This is the conversion people reach for when a PNG is too large to send. A photograph saved as PNG is often several times bigger than the same picture as JPG, with no visible difference.
Two things change. Transparency cannot survive — transparent areas are filled with white — and the compression is lossy, so a screenshot or an image containing text will soften around the edges.
Need the other direction? JPG to PNG
How it works
- Choose one or more PNG files.
- Set the quality; around 85 is a good default for photographs.
- Convert and download the JPG files.
Frequently asked questions
Why did my transparent background turn white?
JPG has no way to store transparency. Every transparent pixel has to be given a colour, and white is the standard choice.
How much smaller will the file be?
For photographs, often a fifth of the PNG or less. For screenshots and flat graphics the saving is much smaller, and the quality cost is much higher.
Should I convert a screenshot to JPG?
Usually not. JPG blurs sharp edges, so text and interface lines come out fuzzy. Keep screenshots as PNG, or use WebP if size matters.