http://linuxfocus.org/cgi-bin/2ztxt can be used as follows:

• If the browser sets the HTTP_REFERER variable then the document pointed to by that variable will be converted. This means that you just need to include a link to http://linuxfocus.org/cgi-bin/2ztxt in your documents.
• http://linuxfocus.org/cgi-bin/2ztxt?url=http://....
  This will convert the document specified after url=
• http://linuxfocus.org/cgi-bin/2ztxt?about or
  http://linuxfocus.org/cgi-bin/2ztxt?help
  will display detailed help and version information.