text-underline-offset

The text-underline-offset CSS property sets the offset distance of an underline text decoration line (applied using text-decoration) from its original position.

text-underline-offset is not part of the text-decoration shorthand. While an element can have multiple text-decoration lines, text-underline-offset only impacts underlining, and not other possible line decoration options such as overline or line-through.

Syntax

/* Single keyword */
text-underline-offset: auto;

/* length */
text-underline-offset: 0.1em;
text-underline-offset: 3px;

/* percentage */
text-underline-offset: 20%;

/* Global values */
text-underline-offset: inherit;
text-underline-offset: initial;
text-underline-offset: unset;

The text-underline-offset property is specified as a single value from the list below.

Values

auto
The browser chooses the appropriate offset for underlines.
<length>
Specifies the offset of underlines as a <length>, overriding the font file suggestion and the browser default. It is recommended to use em units so the offset scales with the font size.
<percentage>
Specifies the offset of underlines as a <percentage> of 1 em in the element's font. A percentage inherits as a relative value, and so therefore scales with changes in the font. For a given application of this property, the offset is constant across the whole box that the underline is applied to, even if there are child elements with different font sizes or vertical alignment.

Formal syntax

auto | <length> | <percentage>

Examples

<p class="oneline">Here's some text with an offset wavy red underline!</p>
<br>
<p class="twolines">This text has lines both above and below it. Only the bottom one is offset.</p>
p { 
  text-decoration: underline wavy red;
  text-underline-offset: 1em;
}

.twolines {
  text-decoration-color: purple;
  text-decoration-line: underline overline;
}

Specifications

Specification Status Comment
CSS Text Decoration Module Level 4
The definition of 'text-underline-offset' in that specification.
Working Draft Initial definition.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
text-underline-offsetChrome No support NoEdge No support NoFirefox Full support 70
Full support 70
Full support 69
Disabled
Disabled From version 69: this feature is behind the layout.css.text-underline-offset.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.
IE No support NoOpera No support NoSafari Full support 12.1WebView Android No support NoChrome Android No support NoFirefox Android No support NoOpera Android No support NoSafari iOS Full support 12.2Samsung Internet Android No support No
percentage valuesChrome No support NoEdge No support NoFirefox Full support 74IE No support NoOpera No support NoSafari No support NoWebView Android No support NoChrome Android No support NoFirefox Android No support NoOpera Android No support NoSafari iOS No support NoSamsung Internet Android No support No

Legend

Full support  
Full support
No support  
No support
User must explicitly enable this feature.
User must explicitly enable this feature.

See also