How to resize an image and convert to PNG format?

There are many free tools you can use to resize any image and convert to PNG format. For example:

1. https://pixlr.com/x/ - This is a good general editing tool and can resize, crop, convert, etc.
2. http://webresizer.com/resizer/ - For resizing images.
3. http://jpg2png.com/ - For converting from JPG to PNG format.