title: Looking for a Jinja online (or at least live) parser
body: <p>I'm having a hard time understanding how some of the Jinja directives are working.  In order to run a few tests (and, eventually, share the results, jsfiddle style), I'd really appreciate to have some online parser, but couldn't find anything on the Web.  </p>
  
  <p>Does it even exist ?</p>