Convert JPG images to lossless PNG format
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People convert JPG to PNG for one of a few practical reasons, and it helps to be clear about what the switch does and does not do. PNG is lossless: once your picture is a PNG, saving and re-saving it never strips away more detail, which is why editors, screenshot pipelines and a lot of print and design tools prefer to work in it. JPEG, by contrast, sheds a little quality every single time it is written. If a JPG is about to go through several rounds of editing, moving it to PNG first freezes its current state so nothing degrades further.
The honest caveat is that this cannot undo compression that already happened. The blocky patches and soft edges a JPG already carries are baked in, and the PNG faithfully copies them rather than repairing them. So expect the same picture, locked in a lossless container, usually as a noticeably larger file. What you gain is stability for editing and a format that some upload forms, plugins and printers specifically ask for.
The conversion comes into its own in a handful of recurring situations. A designer hands a photo to a layout tool that only imports PNG; a screenshot needs to go into documentation where it will be annotated and re-saved several times; a game engine, a label printer or a website builder lists PNG as the one format it accepts. The aim in each case isn't to improve the image but to put it in the container the next step demands, without forcing it through another lossy save.
PNG supports a transparent background, but converting from JPG does not create one, because the JPG never had transparency to begin with. You will get a solid, fully opaque PNG. If your goal is to cut out a subject and drop the background, that is an editing job rather than a format change.
A job takes up to 30 JPGs at a time; a lone file returns as a PNG and a batch as a named ZIP. When you would rather make the file smaller than larger, PNG to JPG runs the opposite way, JPG to WebP trims it for the web, and Convert Image handles WebP, AVIF and the less common targets.
Add one file or a stack of them. The page handles a batch just as easily as a single image.
PNG is lossless, so there's no quality dial to set. Your picture is rewritten exactly as it is.
One file downloads on its own; convert several and they come zipped together.
No, and it's worth being clear about that. The compression a JPG already went through is permanent, so the PNG carries over exactly the same detail and the same artefacts. What it gives you is a lossless file that won't degrade any further, not a sharper or cleaner picture.
That's normal. PNG stores the image losslessly instead of using the aggressive compression JPEG relies on, so for photographic content the file is often several times larger. The trade is size for the guarantee that nothing more is thrown away.
No. PNG is capable of transparency, but a JPG has none to carry over, so you get a fully opaque PNG. Removing a background is a separate editing task and not something a format conversion can do.
Usually not. For photographs on a website PNG tends to be much heavier than it needs to be, which slows the page down. JPG or WebP is the better web format; reach for PNG mainly when you need a transparent background or a lossless master. JPG to WebP is worth a look if speed is the goal.
Up to 30 per batch. A single conversion downloads as a PNG straight away, and a multi-file job is bundled into a ZIP with each file named to match the JPG it came from.