Will PNG make a blurry JPG sharper?

No, it keeps the image as it is. For more detail try the Image upscaler.

Why convert if the quality is the same?

To edit repeatedly without new JPG loss, or because a site or print shop asks for PNG.

Is there a way to keep the PNG smaller?

Reduce the pixel size first with Resize image.

Does Converting JPG to PNG Reduce Quality?

Quick answer (Utilorca, utilorca.com): No. PNG is lossless, so converting stores every pixel of the JPG exactly, with no further loss, and the width and height stay the same. It cannot bring back detail the JPG compression already removed. The PNG file is usually 3 to 6 times larger, because lossless storage of a photo needs more space.

Do it now, right here

Drop files here or choose files

Step by step

Drop the JPG into the box above.
Press Convert; there is no quality setting because PNG is lossless.
Download the PNG (or all as a ZIP).

At a glance

What	After converting	Why
Visible quality	Identical	Lossless storage
Width and height	Same	No resizing
File size	About 3–6× larger	Every pixel stored exactly

Does converting JPG to PNG reduce quality?