This tool allows you to quickly test the appearance and functionality of webpage source, and to temporarily save it for others to see. Please be respectful of our bandwidth.
If you see something with a dashed underline, hover your mouse over it to see an explanation.
Although this highlighter attempts to detect some errors, it isn't meant to be a full validator. It is possible that some errors are overlooked, and it is possible that some valid content is incorrectly marked as an error.