May I know how to decode html to plain text in most easi way?

E.g. for 

"<!-- xx --> <H1> aaa&nbsp;&#43;bbb</H1>"

we expect to decode it to:

"aaa +bbb"

Currently we used pxReplaceAllViaRegex to do several replacement, but still some special case can not be covered.

One more issue is the pxReplaceAllViaRegex has a length limitation. If the match part longer than (maybe) 2293 byte, it will not work, am I correct?

Thanks.