Tidy is able to fix up a wide range of problems and to bring to your attention things that you need to work on yourself. Each item found is listed with the line number and column so that you can see where the problem lies in your markup. Tidy will not generate a cleaned up version when there are problems that it is not sure of how to handle. Fixes problems with heading emphasis . Missing quotes around attribute values are added .
Tidy inserts quote marks around all attribute values.
It can also detect when you have forgotten the closing quote mark, although this is something you will have to fix yourself. This often allows you to spot where you have mistyped an attribute or value. Proprietary elements are recognized and reported as such . Tidy uses UTF-8 internally to represent character values. The full set of HTML 4.0 entities are defined.