font-kerning

The font-kerning CSS property sets the use of the kerning information stored in a font.

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Kerning defines how letters are spaced. In well-kerned fonts, this feature makes character spacing more uniform and pleasant to read than it would otherwise be.

In the image below, for instance, the examples on the left do not use kerning, while the ones on the right do:

Syntax

The font-kerning property is specified as one of the keyword values listed below.

Values

auto

The browser determines whether font kerning should be used or not. For example, some browsers will disable kerning on small fonts, since applying it could harm the readability of text.

normal

Font kerning information stored in the font must be applied.

none

Font kerning information stored in the font is disabled.

Formal syntax

auto | normal | none

Example

HTML

<div id="kern"></div>
<div id="nokern"></div>
<textarea id="input">AV T. ij</textarea>

CSS

div {
  font-size: 2rem;
  font-family: serif;
}

#nokern {
  font-kerning: none;
}

#kern {
  font-kerning: normal;
}

JavaScript

let input  = document.getElementById('input');
let kern   = document.getElementById('kern');
let nokern = document.getElementById('nokern');

input.addEventListener('keyup', function() {
  kern.textContent = input.value; /* Update content */
  nokern.textContent = input.value;
});

kern.textContent = input.value; /* Initialize content */
nokern.textContent = input.value;

Specifications

Browser Compatibility

See also

• font-variant, font-variant-position, font-variant-east-asian, font-variant-caps, font-variant-ligatures, font-variant-numeric, font-variant-alternates, font-synthesis, letter-spacing