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CSS tab-size Property

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The tab-size property in CSS is used to specify the width of the tab character. The tab-size usually displays a single space character in an HTML document. Some elements like <textarea> and <pre> elements display the tab-size.


tab-size: number|length|initial|inherit;

Property Value: The value of tab-size property is listed below: 

  • number: It is used to set the number of space characters in a tab. Its default value is 8.
  • length: It is used to set the length character. But it is not supported by most of the browsers.
  • initial: This property is used to set its default value.
  • inherit: It is used to inherit the property from its parent.

Example: In this example, we are using the above-explained properties.


<!DOCTYPE html>
    <title>tab-size Property</title>
        /* CSS property for tab-size */
        #geeks {
            /* Used for Firefox support */
            -moz-tab-size: 6;
            /* Used for Opera 10.6-12.1 support */
            -o-tab-size: 6;
            tab-size: 6;
        body {
            text-align: center;
        h1 {
            color: green;
<body style="text-align:center">
    <h1 style="color:green">
        The tab-size Property
    <!-- tab-size property used here -->
    <pre id="Geeks1">
         GeeksforGeeks: A computer science portal


Supported Browsers: The browser supported by tab-size property are listed below: 

  • Google Chrome 21.0
  • Edge 79.0
  • Firefox 91.0 
  • Opera 15.0
  • Safari 7.0

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Last Updated : 13 Jun, 2023
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