Compress PNG for WP is a perfect free WordPress plugin to compress and shrink PNG files using the TinyPNG API. As everyone knows, you want a fast loading website (including Google) and one way to optimize your website is to shrink images. This is a easy-to-use free WordPress plugin and all the files can be resized or cancel When uploaded as well as manually resized in the Media Library.
You will need a TinyPNG API, If you do not yet have a key, get one from TinyPNG. Start uploading and compress PNG, and they will be automatically resized and you website can load much faster than before. Great, right!