The font-kerning CSS property controls the usage of the kerning information stored in a font.

/* Keyword values */
font-kerning: auto;
font-kerning: normal;
font-kerning: none;

/* Global values */
font-kerning: inherit;
font-kerning: initial;
font-kerning: unset;

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:

Example of font-kerning

Initial value auto
Applies to all elements. It also applies to ::first-letter and ::first-line.
Inherited yes
Media visual
Computed value as specified
Animation type discrete
Canonical order the unique non-ambiguous order defined by the formal grammar


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


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.
Font kerning information stored in the font must be applied.
Font kerning information stored in the font is disabled.

Formal syntax

auto | normal | none



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


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

#nokern {
  font-kerning: none;

#kern {
  font-kerning: normal;


var input  = document.getElementById('input'),
    kern   = document.getElementById('kern'),
    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;


Specification Status Comment
CSS Fonts Module Level 3
The definition of 'font-kerning' in that specification.
Candidate Recommendation Initial definition.

Browser Compatibility

Feature Chrome Edge Firefox Internet Explorer Opera Safari
Basic support 32 -webkit- Yes


24 — 341

No ? 7
Feature Android webview Chrome for Android Edge mobile Firefox for Android IE mobile Opera Android iOS Safari
Basic support ? ? Yes


24 — 341

No ? 7

1. From version 24 until version 34 (exclusive): this feature is behind the layout.css.font-features.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.

See also

© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.