javascript:var a=(''+document.getSelection())||prompt("Enter text to be rot13ed","");a=a.replace(/[a-z]/gi,function(s){returnString.fromCharCode(s.charCodeAt(0)+13*(('a'<=s&&s<='m'||'A'<=s&&s<='M')?+1:-1))});alert(a);
Pros: Way smaller than an extension.
Cons: Could be better written / made more extensible. May cause nerd-sniping of code golfers. May not work on other/older browsers, maybe. Uses alert.
Here’s a bookmarklet that handles ROT13:
javascript:var a=(''+document.getSelection())||prompt("Enter text to be rot13ed","");a=a.replace(/[a-z]/gi,function(s){return String.fromCharCode(s.charCodeAt(0)+13*(('a'<=s&&s<='m'||'A'<=s&&s<='M')?+1:-1))});alert(a);Pros: Way smaller than an extension.
Cons: Could be better written / made more extensible. May cause nerd-sniping of code golfers. May not work on other/older browsers, maybe. Uses
alert.