Some people really linked the browser notepad in one line thing... well have some syntax highlighting... still in one line. Ok, fine. A really long line. And I cheated so hard that the caret doesn't show up, but that's ok, right? :) Oh, and you can't copy and paste in HTML because contenteditable is really broken for pre tags, jeez.

put_in_address_bar

data:text/html, <style>@import url(http://fonts.googleapis.com/css?family=Inconsolata);html,body{background-color:%233f3f3f}%23f,%23d{background-color:rgba(0,0,0,0);margin:0;padding:3px;font-size:14px;font-family:'Inconsolata';display:block}pre .nocode {background-color:none;color:%23000}pre .str{color:%23cc9393}pre .kwd{color:%23f0dfaf}pre .com{color:%237f9f7f}pre .typ {color:%23dfdfbf}pre .lit{color:%238cd0d3}pre .pun{color:%23fff}pre .pln{color:%23dcdccc}pre .tag{color:%23e89393;font-weight:bold}pre .atn{color:%23dfdfbf;font-weight:bold}pre .atv{color:%23dca3a3}pre .dec{color:%23efdcbc}ol.linenums{margin-top:0;margin-bottom:0;color:%23AEAEAE}li.L1,li.L3,li.L5,li.L7,li.L9{}%23m{position:relative;z-index:1;color:rgba(0,0,0,0);border:1px solid %23888}%23d{z-index:0;position:absolute;left:0px;top:0px}%23p{position:relative}</style><script src="http://google-code-prettify.googlecode.com/svn/trunk/src/prettify.js" type="text/javascript"></script><div id="p"><pre id="m"><code id="f" oninput='d=document.getElementById("d");f=document.getElementById("f");if(d.innerText==undefined){d.innerHTML=f.innerHTML}else{d.innerText=f.innerText}d.className="prettyprint";prettyPrint()' contenteditable></code></pre><pre id="d">