HTML Comments

How to Add Comments in HTML

You can add comments to your HTML source by using the following syntax:

<!-- Write your comments here -->

Notice that there is an exclamation point (!) in the start tag, but not in the end tag.

<!-- This is a single-line comment -->
<p>This is a paragraph.</p>

Why Use Comments?

With comments you can place notifications and reminders in your HTML code:

• Explain your code: This can be helpful if you edit the source code at a later date.
• Leave notes for others: If you work in a team, comments can help other developers understand your code.
• Temporarily hide content: You can "comment out" parts of your code to hide them from the browser without deleting them. This is useful for debugging.

Multi-line Comments

Comments can also span multiple lines.

<!--
This is a multi-line comment.
It can span across several lines.
-->
<p>This is another paragraph.</p>

Conditional Comments

Conditional comments were a feature specific to Internet Explorer. While largely obsolete now, you might still encounter them in older codebases. They were used to provide specific instructions or styles for different versions of IE.

<!--[if IE 9]>
    <p>This content is only displayed in Internet Explorer 9.</p>
<![endif]-->