Convert JPG to PNG

Converting JPG to PNG is worth doing when the destination matters more than the source. JPG is built for photographs, where small files matter more than perfect fidelity. PNG is built for screenshots, logos and anything needing sharp edges or transparency. Which one you want depends entirely on where the image is going next.

The usual reason for this one is editing rather than delivery. Every time a JPG is opened, altered and saved again it is recompressed, and the damage accumulates across generations. Converting to PNG before you start editing freezes the quality where it is, so repeated saves cost nothing. Export back to JPG once at the end.

Worth knowing before you start: converting from JPG to PNG does not recover quality. JPG discarded detail permanently when it was first saved, and PNG preserves faithfully whatever it is given, including those existing compression artefacts. The file will get considerably larger with nothing visible gained. Convert from the original if you still have it.

PNG will preserve faithfully whatever it is handed, which from a lossy source means preserving the compression artefacts too. The file grows substantially and looks identical. That is worth it when you are about to edit, because it stops further generation loss, and pointless if you are simply saving a copy.

Your JPG is decoded to raw pixels in this tab and re-encoded once into the new format, so the file passes through exactly one additional compression step rather than several. MozJPEG and OxiPNG do the encoding, the same libraries image tooling relies on, compiled to WebAssembly.

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