HTML <strong> Tag

The HTML <strong> tag represents strong importance, seriousness, or urgency for its contents.

You can nest <strong> tags to indicate stronger importance. You can use Cascading Style Sheets to make nested tags appear stronger.


The <strong> tag is written as <strong></strong> with the strong text inserted between the start and end tags.

Like this:



The <strong> tag can be used to convey importance in a heading, caption, or paragraph when a certain part needs to be distinguished as the part that really matters from other parts. Like this:


The <strong> tag can be used to convey urgency to content that should be seen sooner than other parts of the document. Like this:


The <strong> tag can also be used to convey seriousness, such as when displaying a caution or warning notice. Like this:

Nesting <strong> Tags

You can nest <strong> tags inside each other. The level of importance is determined by the number of ancestor <strong> tags. Each <strong> element increases the importance of its contents.


Browsers normally display the <strong> element in bold text. However, if you nest <strong> elements, the nested elements probably won't appear any different than the non-nested elements (i.e. where only one <strong> element is used).

You could use CSS to modify the styles of any nested <strong> elements.

Here, I've specified that any <strong> element that is nested inside another <strong> element should be 120% larger than its parent <strong> element.


Attributes can be added to an HTML element to provide more information about how the element should appear or behave.

The <strong> element accepts the following attributes.


Global Attributes

The following attributes are standard across all HTML elements. Therefore, you can use these attributes with the <strong> tag , as well as with all other HTML tags.

For a full explanation of these attributes, see HTML 5 global attributes.

Event Handlers

Event handler content attributes enable you to invoke a script from within your HTML. The script is invoked when a certain "event" occurs. Each event handler content attribute deals with a different event.

Most event handler content attributes can be used on all HTML elements, but some event handlers have specific rules around when they can be used and which elements they are applicable to.

For more detail, see HTML event handler content attributes.