Converting Various Markup to MediaWiki
1 Using Perl on your own computer
Grab the HTML-WikiConverter, build it and follow the directions. You will need to supply the HTML file names on the command line and capture the output (the program writes to standard output) and then open a MediaWiki page for editing and paste the MediaWiki markup. Fairly painless unless you're working with a complex, multipage document.
2 Using online tools
These are web pages (CGIs) which run the HTML-WikiConverter software. They save you the trouble of getting the code and building it.
- This is the best converter, since it lets you paste a URL or the HTML: http://diberri.dyndns.org/wikipedia/html2wiki/index.html