JPG is the most widely used file format, but it has one significant weakness: it has no allow alpha channel. Whenever you need a graphic to display on a different surface with no background artifacts, you must use PNG file type.
Transforming JPG to PNG is a straightforward operation, and knowing when this is the correct option saves time and avoid unnecessary file bloat.
The most common purpose to convert JPG to PNG is to gain access to PNG's alpha channel. This is critical for watermarks and design assets that need to appear naturally on different backgrounds.
An important thing to remember: changing a JPG to PNG does not automatically make the alpha channel. You must still to delete the background with a photo editor like Photoshop or GIMP.
Be mindful of during conversion of JPG to PNG is that PNG images are usually larger than their JPG equivalents. This is because PNG employs non-destructive compression which stores complete image information.
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