CSS letter-spacing

<!doctype html>
<title>Example</title>
<style>
p {
  font-family: sans-serif;
  font-size: 2em;
  color: limegreen;
  }
.wide-tracking { 
  letter-spacing: 0.2em; 
  }
.narrow-tracking { 
  letter-spacing: -0.1em; 
  }
</style>
<p>Normal text</p>
<p class="wide-tracking">Wide letter spacing</p>
<p class="narrow-tracking">Narrow letter spacing</p>

The CSS letter-spacing property determines the space in between letters.

Letter spacing is applied after bidi reordering (direction and unicode-bidi) and is in addition to any word-spacing.

The value that you provide to the letter-spacing property specifies any additional space between the letters. You can also use a negative value to pull each letter closer to each other.

Syntax

Possible Values

The letter-spacing property accepts the following values.

normal: No additional spacing is applied. Computes to zero.
length: Specifies additional spacing between characters using a length value (for example 0.2em). Values may be negative, but the browser may impose limits on a negative value.

In addition, all CSS properties also accept the following CSS-wide keyword values as the sole component of their property value:

initial: Represents the value specified as the property's initial value.
inherit: Represents the computed value of the property on the element's parent.
unset: This value acts as either inherit or initial, depending on whether the property is inherited or not. In other words, it sets all properties to their parent value if they are inheritable or to their initial value if not inheritable.

General Information

Initial Value: normal
Applies To: All elements
Inherited?: Yes
Media: Visual
Animatable: Yes (see example)

Example Code

Official Specifications

CSS Text Module Level 3 (W3C Last Call Working Draft 10 October 2013)
CSS Level 2.1 (W3C Recommendation 07 June 2011)
CSS Level 1 (W3C Recommendation 17 Dec 1996)