ttf to png conversion can actually be used for several thing, the most obvious being use of particular TrueType font for adding text to a picture. This can be done with pretty much any graphics editor actually, even basic MS Paint. But for best effect it's better to use some dedicated vector graphics software like CorelDraw, so you can adjust and resize the fonts freely. You can find many tutorials and guides about this subject on the Internet.
Updated: September 28, 2023