No. The quality lost during JPG compression cannot be recovered. The PNG will be lossless going forward but will not be better than the JPG.
PNG supports transparency. If you need to remove the background or overlay the image on another, PNG is the right format.
Yes. PNG is lossless and uncompressed, so the file size will typically be larger than the equivalent JPG.
Converting to PNG does not automatically remove the background. Use an image editor or our background removal tool to remove the background, then save as PNG.
Yes. Since JPG has no transparency, the PNG will have a solid white background (or whatever the original JPG background was).
Yes. PNG is lossless and preserves sharp text edges. JPG compression creates visible artefacts around text and sharp edges.
The conversion requires decoding the JPG and re-encoding as PNG. No additional quality loss occurs during this process.