HTML alt attribute

The HTML alt attribute is used to provide an alternate tag that is used to show or display something if the primary attribute i.e., the <img> tag, fails to display the value assigned to it.

Supported tags:

area
image
input
<applet>

Attribute Values: It contains single value text which is used to specify the alternative text for the supported element if the image is not displaying.

Example: Img alt attribute.

html

<!DOCTYPE html>
<html>
 
<head>
    <title>
        HTML img alt Attribute
    </title>
</head>
 
<body>
    <h1>GeeksforGeeks</h1>
    <h2>HTML img alt Attribute</h2>
    <img
        src=
"https://media.geeksforgeeks.org/wp-content/uploads/20190506164011/logo3.png"
        alt="GeeksforGeeks logo">
</body>
 
</html>

Output:

HTML alt attribute

Example: Area alt attribute.

html

<!DOCTYPE html>
<html>
 
<head>
    <title>
        HTML area alt Attribute
    </title>
</head>
 
<body style="text-align:center;">
    <img src=
"https://media.geeksforgeeks.org/wp-content/uploads/20190227165729/area11.png"
        alt="alt_attribute" width="300" height="119" class="aligncenter"
        usemap="#shapemap" />
 
    <map name="shapemap">
         
        <!-- area tag contained image. -->
        <area shape="poly" coords="59, 31, 28, 83, 91, 83" href=
"https://media.geeksforgeeks.org/wp-content/uploads/20190227165802/area2.png"
        alt="Triangle">
         
        <area shape="circle" coords="155, 56, 26" href=
"https://media.geeksforgeeks.org/wp-content/uploads/20190227165934/area3.png"
        alt="Circle">
         
        <area shape="rect" coords="224, 30, 276, 82" href=
"https://media.geeksforgeeks.org/wp-content/uploads/20190227170021/area4.png"
        alt="Square">
    </map>
</body>
 
</html>

Output:

HTML area alt attribute

Example: Input alt attribute.

html

<!DOCTYPE html>
<html>
 
<head>
    <title>
        HTML Input alt Attribute
    </title>
</head>
 
<body style="text-align:center;">
 
    <h1 style="color:green;">
        GeeksForGeeks
    </h1>
 
    <h2>HTML Input alt Attribute</h2>
    <input id="myImage"
           type="image"
           src=
"https://media.geeksforgeeks.org/wp-content/uploads/gfg-40.png"
           alt="Submit"
           width="48"
           height="48">
</body>
 
</html>