This site gives a visual representation of Lojban language text as parsed by the jbofihe parser.
This site's code is on GitHub.
This program was originally PHP and hosted at https://lojban.org/jboski/index.php ; you can see the source. The original version was by Raphaël Poss / r.poss [at] online.fr
There is a similar parser that uses the newer camxes. It is much prettier but it does not show a partial translation.
There is a parser that uses a JS version of camxes, but its output is not as pretty.