A JPEG should have almost zero perceptible difference in quality, although this depends on the original image’s content and file type. To do this, JPEG relies on discrete cosine transform (DCT) .

When choosing between PNG and JPG, it's important to understand their strengths. PNG is often the better choice, especially ...

However, users need to note that if they wish to save their images with a transparent background, they need to store the image as a PNG file. Other formats like JPG don’t support transparent images.