Image Converter
Convert PNG to JPG Online
JPG compresses photos far more efficiently than PNG, and many portals only accept JPG uploads anyway. CompressIO converts any PNG to JPG in your browser — with a white, black, or custom background fill for transparency areas.
Open the Image Converter →
Free · No sign-up · 100% private — works entirely in your browser
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JPG files are typically 5–10x smaller than PNG for photographic content.
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Portal-friendly — many upload forms accept only JPG.
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Transparency is replaced with a background color you choose.
Frequently asked questions
What happens to transparent areas?+
JPG has no alpha channel, so you pick a background color (white by default) and the transparent areas are filled with it.
Is the conversion quality adjustable?+
Yes — choose the JPG quality level from 10% to 100% to balance size and sharpness.