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tab-size

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

Thetab-size CSS property is used to customize the width of a tab (U+0009) character.

/* <integer> values */
tab-size: 4;
tab-size: 0;

/* <length> values */
tab-size: 10px;
tab-size: 2em;

/* Global values */
tab-size: inherit;
tab-size: initial;
tab-size: unset;
Initial value 8
Applies to block containers
Inherited yes
Media visual
Computed value the specified integer or an absolute length
Animation type a length
Canonical order the unique non-ambiguous order defined by the formal grammar

Syntax

Values

<integer>
The number of spaces in a tab. Must be nonnegative.
<length>
The width of a tab. Must be nonnegative.

Formal syntax

<integer> | <length>

Examples

pre {
  tab-size: 4; /* Set tab size to 4 spaces */
}

pre {
  tab-size: 0; /* Remove indentation */
}

pre {
  tab-size: 2; /* Set tab size to 2 spaces */
}

Specifications

Specification Status Comment
CSS Text Module Level 3
The definition of 'tab-size' in that specification.		 Working Draft Initial definition

Browser compatibility

Feature Chrome Edge Firefox Internet Explorer Opera Safari
Basic support 211 No 4 -moz- 2 3 No

15

10.5 -o-

6.1
<length> 42 No 53 No 29 No
Feature Android webview Chrome for Android Edge mobile Firefox for Android Opera Android iOS Safari Samsung Internet
Basic support 4.4 ? ? 4 -moz- 2 3

24

11.5 -o-

7.1 ?
<length> 56 ? ? 53 37 No ?

1. This property is not yet animatable.

2. See bug 737785 for the status of unprefixing this property.

3. Before Firefox 53, this property was not animatable.

See also

Edit this page on MDN

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https://developer.mozilla.org/en-US/docs/Web/CSS/tab-size