Will this improve the image quality?

No. It prevents further loss from future saves, but detail JPEG has already thrown away is gone. Nothing can recover it.

Why is the PNG so much bigger?

PNG is lossless — it stores every pixel rather than approximating them. For photographs that is normally several times the size of the JPG.

Convert JPG to PNG

Convert JPG images to PNG in your browser. Lossless output, no upload, no account.

Open the converter

Worth being straight about what this does and does not do. Converting JPG to PNG stops any further loss — from here on the pixels are stored exactly — but it cannot restore detail JPEG already discarded. If the source has visible blocking around text, the PNG will preserve that blocking perfectly.

So the good reasons to convert are practical rather than restorative: a tool that will only accept PNG, an editing workflow where you do not want repeated saves degrading the image further, or an asset you are about to add transparency to.

The file will get bigger, usually a lot bigger. That is PNG storing every pixel rather than approximating them, and it is the cost of the format rather than something to tune.

How it works

Drop your JPG files on the page
Choose PNG as the output
Download, one file or all at once

Worth knowing. Converting to PNG does not undo JPEG compression — artefacts already in the source are preserved exactly. Expect the output to be considerably larger than the input.

Questions

Will this improve the image quality?: No. It prevents further loss from future saves, but detail JPEG has already thrown away is gone. Nothing can recover it.
Why is the PNG so much bigger?: PNG is lossless — it stores every pixel rather than approximating them. For photographs that is normally several times the size of the JPG.

Everything the converter reads and writes →

Runs entirely in your browser. The file is never uploaded, so there is nothing for us to store, log or lose. No account, no watermark, no size paywall.