Convert PNG images into smaller JPG files, right in your browser. Transparency is flattened to white.
PNG and JPG are both everyday image formats, but they are built for different things, and PNG files can be surprisingly heavy. PNG stores images losslessly, which is perfect for screenshots and graphics but bloated for photographs, where the same picture as a JPG is often a fraction of the size. Converting PNG to JPG is how you turn a large, lossless file into a light one that uploads fast and attaches to email without a fuss.
To use it, load one PNG or a batch and each is re-encoded as a JPG you can download, with your originals kept as they are. The result is a compact photo-friendly file. Because JPG has no transparency, any transparent areas in the PNG are flattened to a solid background, typically white, so the image stays a normal rectangle.
The trade-off is quality versus size. JPG is lossy, so it discards some detail to shrink the file, though at a good quality setting the loss is usually invisible in photos. Where JPG struggles is sharp text and hard edges, which can pick up faint halos. If your PNG is a screenshot full of crisp lettering, weigh whether the smaller JPG is worth that slight softening.
Convert to JPG when the PNG is a photograph or when file size and compatibility matter more than perfect edges. Keep the PNG when you need transparency, or when the image is a logo, diagram, or screenshot where every edge should stay razor sharp. In short, photos favor JPG and graphics favor PNG.
People use this to shrink heavy PNG photos before uploading, to meet a form that only accepts JPG, to lighten images for a faster website, and to email a set of pictures without hitting an attachment limit.
The conversion runs in your browser with the device's own encoder, so nothing is uploaded and no account is needed. It is free, and the only real limit is your device's memory, which shows up only with very large files. Your images never leave your machine.
JPG does not support transparency, so any see-through pixels are filled with a solid color, usually white, during conversion. This is expected behavior for the format. Keep the file as PNG, or convert to WebP, if you need the transparency preserved.
For photographs the JPG is often a large fraction smaller than the PNG, sometimes several times lighter, because JPG compresses photos far more efficiently. Graphics with flat colors may shrink less. The exact saving depends on the image content.
They can, because JPG's compression is tuned for photos and can leave faint halos around crisp lettering and hard edges. For screenshots and diagrams, PNG usually keeps a cleaner look. For photographs the effect is rarely noticeable.
Yes, JPG discards some detail during the save and that cannot be recovered from the JPG later. Your original PNG on disk is untouched, so keep it if you might need the lossless version again. Convert a fresh copy rather than repeatedly re-saving JPGs.
Keep PNG when you need transparency, or when the image is a logo, screenshot, or diagram where sharp edges matter. PNG is lossless, so it holds those details perfectly. Reach for JPG mainly for photographs and when size is the priority.
Yes, load a batch and download each JPG. The practical ceiling is your device's memory, so very large sets may be slower on modest hardware. Typical images convert almost instantly.
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