font-feature-settings

The font-feature-settings CSS property controls advanced typographic features in OpenType fonts.

Syntax

/* Use the default settings */
font-feature-settings: normal;

/* Set values for OpenType feature tags */
font-feature-settings: "smcp";
font-feature-settings: "smcp" on;
font-feature-settings: "swsh" 2;
font-feature-settings: "smcp", "swsh" 2;

/* Global values */
font-feature-settings: inherit;
font-feature-settings: initial;
font-feature-settings: revert;
font-feature-settings: unset;

Whenever possible, Web authors should instead use the font-variant shorthand property or an associated longhand property such as font-variant-ligatures, font-variant-caps, font-variant-east-asian, font-variant-alternates, font-variant-numeric or font-variant-position.

These lead to more effective, predictable, understandable results than font-feature-settings, which is a low-level feature designed to handle special cases where no other way exists to enable or access an OpenType font feature. In particular, font-feature-settings shouldn't be used to enable small caps.

Values

normal: Text is laid out using default settings.
<feature-tag-value>: When rendering text, the list of OpenType feature tag value is passed to the text layout engine to enable or disable font features. The tag is always a <string> of 4 ASCII characters. If it has more or less characters, or if it contains characters outside the U+20 – U+7E codepoint range, the whole property is invalid. The value is a positive integer. The two keywords on and off are synonyms for 1 and 0 respectively. If no value is set, the default is 1. For non-Boolean OpenType features (e.g. stylistic alternates), the value implies a particular glyph to be selected; for Boolean values, it is a switch.

Formal definition

Initial value	`normal`
Applies to	all elements. It also applies to `::first-letter` and `::first-line`.
Inherited	yes
Computed value	as specified
Animation type	discrete

Formal syntax

normal | <feature-tag-value>#where 
<feature-tag-value> = <string> [ <integer> | on | off ]?

Examples

Enabling various font features

/* use small-cap alternate glyphs */
.smallcaps { font-feature-settings: "smcp" on; }

/* convert both upper and lowercase to small caps (affects punctuation also) */
.allsmallcaps { font-feature-settings: "c2sc", "smcp"; }

/* use zeros with a slash through them to differentiate from "O" */

.nicezero { font-feature-settings: "zero"; }

/* enable historical forms */
.hist { font-feature-settings: "hist"; }

/* disable common ligatures, usually on by default */
.noligs { font-feature-settings: "liga" 0; }

/* enable tabular (monospaced) figures */
td.tabular { font-feature-settings: "tnum"; }

/* enable automatic fractions */
.fractions { font-feature-settings: "frac"; }

/* use the second available swash character */
.swash { font-feature-settings: "swsh" 2; }

/* enable stylistic set 7 */
.fancystyle {
  font-family: Gabriola; /* available on Windows 7, and on Mac OS */
  font-feature-settings: "ss07";
}

Specifications

Specification
CSS Fonts Module Level 5 (CSS Fonts 5) # font-feature-settings-prop

Browser compatibility

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet
`font-feature-settings`	48 16	15	34 The ISO/IEC CD 14496-22 3rd edition suggests using the `ssty` feature to provide glyph variants more suitable for use in scripts (for example primes used as superscripts). Starting with Firefox 29, this is done automatically by the MathML rendering engine. The ISO/IEC CD 14496-22 3rd edition also suggests applying the `dtls` feature to letters when placing mathematical accents to get dotless forms (for example dotless i, j with a hat). Starting with Firefox 35, this is done automatically by the MathML rendering engine. You can override the default values determined by the MathML rendering engine with CSS. 15 From Firefox 4 to Firefox 14 (inclusive), Firefox supported an older, slightly different syntax. See OpenType Font Feature support in Firefox 4.	10	35 15	9.1 4-6	4.4	48	34 The ISO/IEC CD 14496-22 3rd edition suggests using the `ssty` feature to provide glyph variants more suitable for use in scripts (for example primes used as superscripts). Starting with Firefox 29, this is done automatically by the MathML rendering engine. The ISO/IEC CD 14496-22 3rd edition also suggests applying the `dtls` feature to letters when placing mathematical accents to get dotless forms (for example dotless i, j with a hat). Starting with Firefox 35, this is done automatically by the MathML rendering engine. You can override the default values determined by the MathML rendering engine with CSS. 15 From Firefox 4 to Firefox 14 (inclusive), Firefox supported an older, slightly different syntax. See OpenType Font Feature support in Firefox 4.	35 14	9.3 3.2-6.1	5.0