Clicking on browse will open a window that'll allow you to select an image. Dragging and Dropping will allow you to insert any .png image.
Select An Image to Convert
Only .JPG/JPEG image formats will work which will be displayed on the screen once selected.
Click on 'Convert' and wait for the image to download
Clicking on 'Convert to .PNG' automically converts the image and then once complete a popup window will show up giving you the option to download the new image.