Understanding the U Tag In HTML5

2 min read


The <u> tag is an HTML element that is used to underline text on a web page. While it may seem like a simple task, there’s more to this tag than meets the eye. This article will explore the <u> tag in detail, including code examples and a list of all applicable attributes with explanations.

Code Examples

Here is an example of how to use the <u> tag in HTML:

<p>This is <u>important</u> information.</p>

In this example, the word “important” will be displayed with an underline.


The <u> tag has several attributes that can be used to customize its appearance and behavior. Here is a list of all applicable attributes, along with explanations of what they do:

  • style – This attribute allows you to apply CSS styles directly to the <u> tag. For example, you could use this attribute to change the color or font size of the underlined text.
  • class – This attribute allows you to assign a class to the <u> tag, which can then be styled using CSS.
  • id – This attribute allows you to assign an ID to the <u> tag, which can be used to target it with JavaScript or CSS.
  • title – This attribute allows you to provide a tooltip for the <u> tag, which will be displayed when the user hovers over the underlined text.
  • data-* – These are custom data attributes that can be used to store additional information about the <u> tag.


The <u> tag may seem simple, but it has many useful applications. By understanding its syntax and attributes, you can create more engaging and interactive web pages for your users.

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