How this tool works
JPEG does not support transparency, so transparent PNG areas must be filled with a background colour. Use JPEG for photographic content; retain PNG when transparency or sharp interface graphics matter.
Privacy and editorial review
This tool runs in your browser and does not require an account. GrowthSparx reviews its logic and explanatory content, but you should verify outputs before production use.
Frequently asked questions
What happens to transparent PNG areas?
They are filled with the background colour selected in the tool.
Is JPG always smaller than PNG?
Not always, but JPEG is often smaller for photographs and complex continuous-tone images.
Does conversion happen online?
The page can be loaded from the web, but image processing itself happens locally in the browser.