Converting JPG to PNG is the odd one out among image conversions — you're moving to a larger file, so it's worth being clear about when it's genuinely the right move and when it isn't.
When PNG is the right target: you're about to edit the image, and you don't want quality quietly degrading with every save. JPG is lossy: each re-save shaves a little more detail away, and edits compound the damage. Convert to PNG first, do all your editing losslessly, and export a JPG once at the very end — that workflow keeps one compression pass in the whole chain instead of five. PNG is also the answer when a form or system specifically demands it (some profile-photo uploaders, print-on-demand services, and document systems only take PNG), and when you need an image format that never introduces new artifacts, full stop.
When it isn't: if you're hoping the conversion improves the image — it can't. A JPG's compression artifacts are baked into the pixels; PNG preserves them faithfully, it just doesn't add more. And converting to PNG won't give you a transparent background: JPGs have no transparency to recover, so the PNG will have the same solid background the JPG had. (If you need the background actually removed, that's a different job — our background remover is built for exactly it.)
The mechanics here are simple and private. Drop one JPG or fifty; each converts inside your own browser — nothing is uploaded, nothing touches a server, and the page keeps working with the internet off. Files come back at identical pixel dimensions, byte-for-byte lossless from the moment of conversion onward, individually downloadable or bundled as a ZIP. Expect the PNGs to be noticeably bigger than the JPGs that made them: that's the price of lossless, and for an editing workflow it's a price worth paying.
No signup, no watermark, no caps. And if what you actually dropped is a PNG, WebP or HEIC, the page says so and hands you a link to the right tool instead of an error.