The font-synthesis CSS property controls which missing typefaces, bold, italic, or small-caps, may be synthesized by the browser.

font-synthesis: none; font-synthesis: weight; font-synthesis: style; font-synthesis: small-caps; font-synthesis: weight style small-caps;  /* Global values */ font-synthesis: inherit; font-synthesis: initial; font-synthesis: revert; font-synthesis: unset; 

font-synthesis

The font-synthesis CSS property controls which missing typefaces, bold, italic, or small-caps, may be synthesized by the browser.

Syntax

font-synthesis: none; font-synthesis: weight; font-synthesis: style; font-synthesis: small-caps; font-synthesis: weight style small-caps;  /* Global values */ font-synthesis: inherit; font-synthesis: initial; font-synthesis: revert; font-synthesis: unset; 

Values

none

Indicates that no bold, italic, nor small-caps typeface may be synthesized.

weight

Indicates that a bold typeface may be synthesized if needed.

style

Indicates that an italic typeface may be synthesized if needed.

small-caps

Indicates that a small-caps typeface may be synthesized if needed.

Description

Most standard Western fonts include italic and bold variants, and some fonts include a small-caps variant. However, many fonts do not. Fonts used for Chinese, Japanese, Korean and other logographic scripts tend not to include these variants, and synthesizing them may impede the legibility of the text. In these cases, it may be desirable to switch off the browser's default font-synthesis.

Formal definition

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

Formal syntax

none | [ weight || style || small-caps ]

Examples

Disabling font synthesis

HTML

<em class="syn">Synthesize me! 站直。</em> <br/> <em class="no-syn">Don't synthesize me! 站直。</em> 

CSS

em {   font-weight: bold; } .syn {   font-synthesis: style weight small-caps; } .no-syn {   font-synthesis: none; } 

Result

Specifications

Specification
CSS Fonts Module Level 4 # font-synthesis

See also

font-style font-weight