Also, you can interactively click on the input PNG to instantly remove any color and its tones. For example, if you click a green pixel, then all greenish pixels will be made transparent. This way, you don't have to know the name or code of the transparent color and you can make the PNG transparent by simply clicking on the color in the PNG.

30 PurePNG is a free to use PNG gallery where you can download high quality transparent CC0 PNG images without any background. From cliparts to people over logos and effects with more than 30000 transparent free high resolution PNG photos on line.

By increasing the smoothness radius, you can remove more pixels from the edges and make PNG clearer. Also, you can interactively click on the input PNG to instantly remove any color and its tones. For example, if you click a green pixel, then all greenish pixels will be made transparent.