YAML Debug: A Powerful and Cool Online Web Debugging Tool

YAML Debug is a simple, powerful, and aesthetically pleasing online web debugging tool from Germany. More importantly, it is extremely convenient to use. Debugging tools are essential for web developers. However, for those of us who are not professionals and only occasionally modify themes, it may seem like overkill.

Whether or not you need it, I would still recommend bookmarking it. It won't take up space on your hard drive, nor will it affect browser performance like an extension might.