Vertical Text Direction

Solution 1:

Alternative approach: http://www.thecssninja.com/css/real-text-rotation-with-css

p { writing-mode: tb-rl; }

Solution 2:

-webkit-transform: rotate(90deg);

The other answers are correct but they led to some alignment problems. On trying out different things this CSS piece code worked perfectly for me.

.vertical{
    writing-mode:tb-rl;
    -webkit-transform:rotate(90deg);
    -moz-transform:rotate(90deg);
    -o-transform: rotate(90deg);
    -ms-transform:rotate(90deg);
    transform: rotate(90deg);
    white-space:nowrap;
    display:block;
    bottom:0;
    width:20px;
    height:20px;
}

Solution 3:

I was searching for an actual vertical text and not the rotated text in HTML as shown below. So I could achieve it by using the following method.

HTML:-

<p class="vericaltext">
Hi This is Vertical Text!
</p>

CSS:-

.vericaltext{
    width:1px;
    word-wrap: break-word;
    font-family: monospace; /* this is just for good looks */
}

JSFiddle! Demo.

Update:- If you need the whitespaces to be displayed, then add the following property to your css.

white-space: pre;

So, the css class shall be

.vericaltext{
    width:1px;
    word-wrap: break-word;
    font-family: monospace; /* this is just for good looks */
    white-space: pre;/* this is for displaying whitespaces */
}

JSFiddle! Demo With Whitespace

Update 2 (28-JUN-2015)

Since white-space: pre; doesnt seem to work (for this specific use) on Firefox(as of now), just change that line to

white-space: pre-wrap;

So, the css class shall be

.vericaltext{
    width:1px;
    word-wrap: break-word;
    font-family: monospace; /* this is just for good looks */
    white-space:pre-wrap; /* this is for displaying whitespaces including Moz-FF.*/
}

JsFiddle Demo FF Compatible.