PNG to JPG online — convert and compress
Convert PNG to JPG online free and shrink the file. Quality slider, local in the browser.
PNG is lossless and often heavy. JPEG drops data you will not miss in photos and cuts the file size.
Open the compressor, choose JPEG and set quality. Transparency becomes a white background.
JPEG has no alpha channel. A PNG logo on transparency becomes a flat rectangle, usually white or black, unless you pick the matte colour first. Photographs survive the move; screenshots of text get fuzzy halos around letters. One conversion at quality 90 is milder than three saves at quality 70, because each JPEG generation adds error. The page forces JPEG output. General compression, where you might stay on WebP, is the other converter.
FAQ
What happens to transparency?
JPEG has no alpha. Transparent pixels flatten onto the canvas (typically opaque).