CSS tab-size Property

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.example1 {
  tab-size: 2;

.example2 {
  tab-size: 10;



The tab-size property is used to customize the width of tab characters (U+0009).

Note: No browser is currently supporting the length unit value.

Default value:8
JavaScript syntax:

Standard Syntax

tab-size: number|length|initial|inherit|revert|revert-layer|unset;

Browser Support

The numbers in the table specify the first browser version that fully supports the property.


Property Values

The following table describes the values of this property.

Value Description
number Default value is 8. Specifies the number of space-characters to be displayed for each tab-character.
length Specifies the width of a tab as a length value in px, pt, cm, em, etc. Negative length values are not allowed.
initial Sets this property to its default value.
inherit If specified, the associated element takes the computed value of its parent element animation-delay property.
revert Reverts the cascaded value of the property from its current value to the value the property
revert-layer Rollback styles to the ones specified in previous cascade layers.
unset Resets a property to its inherited value if the property naturally inherits from its parent, and to its initial value if not.

Default CSS Property Values

selectors {
  tab-size: 8;
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