HTML Attributes

HTML Attributes
HTML Attributes

HTML attribute provides additional information about an HTML element. Each element some attribute whereas some attributes are build for specific elements.

HTML Attributes

  • All HTML elements can have multiple attributes
  • Attributes provide additional information about an element
  • HTML Attributes are always specified in the start tag
  • Attributes usually come in name/value pairs like: name=”value”


<a href="">This is a navigation link</a>

The href Attribute

HTML links are defined with the <a> tag. The link address is specified in the href attribute:


<a href="">This is a link</a>

You will learn more about links and the <a> tag later in this tutorial.

The src Attribute

HTML images are defined with the <img> tag.

The filename of the image source is specified in the src attribute:


<img src="img_girl.jpg">

The width and height Attributes

 HTML images also have width and height attributes, which specifies the width and height of the image:


<img src="img_girl.jpg" width="500" height="600">

The width and height are specified in pixels by default; so width=”500″ means 500 pixels wide.

You will learn more about images in our HTML Images.

The alt Attribute

The alt attribute specifies an alternative text to be used, if an image cannot be displayed.

The value of the alt attribute can be read by screen readers. This way, someone “listening” to the webpage, e.g. a vision impaired person, can “hear” the element.


<img src="img_girl.jpg" alt="Girl with a jacket">

The alt attribute is also useful if the image cannot be displayed (e.g. if it does not exist):

The style Attribute

The style attribute is used to specify the styling of an element, like color, font, size etc.


<p style="color:red">This is a red paragraph.</p>

You will learn more about styling later in this tutorial, and in our CSS Tutorial.

The lang Attribute

The language of the document can be declared in the <html> tag.

The language is declared with the lang attribute.

Declaring a language is important for accessibility applications (screen readers) and search engines:

 <!DOCTYPE html>  <html lang="en-US"> <body> ...  </body> </html> 

The title Attribute

Here, a title attribute is added to the <p> element. The value of the title attribute will be displayed as a tooltip when you mouse over the paragraph:


<p title="I'm a tooltip">
This is a my paragraph.

We Suggest: Use Lowercase HTML Attributes

The HTML standard does not require lowercase attribute names.

The title attribute can be written with uppercase or lowercase like title or TITLE.

W3C recommends lowercase in HTML, and demands lowercase for stricter document types like XHTML.

At W3Schools we always use lowercase attribute names.

We Suggest: Quote Attribute Values

The HTML standard does not require quotes around attribute values.

The href attribute can be written without quotes:


<a href= >


<a href="">

W3C recommends quotes in HTML, and demands quotes for stricter document types like XHTML.

Sometimes it is necessary to use quotes. This example will not display the title attribute correctly, because it contains a space:


<p title=About CprogrammingSImPly>

Using quotes are the most common. Omitting quotes can produce errors.
At W3Schools we always use quotes around attribute values.

Single or Double Quotes?

Double quotes around attribute values are the most common in HTML, but single quotes can also be used.

In some situations, when the attribute value itself contains double quotes, it is necessary to use single quotes:<p title=’John “ShotGun” Nelson’>

Or vice versa:<p title=”John ‘ShotGun’ Nelson”>

Chapter Summary

  • All HTML elements can have attributes
  • The title attribute provides additional “tool-tip” information
  • The href attribute provides address information for links
  • The width and height attributes provide size information for images
  • The alt attribute provides text for screen readers

HTML Attributes

Below is an alphabetical list of some attributes often used in HTML, which you will learn more about in this tutorial:

altSpecifies an alternative text for an image, when the image cannot be displayed
disabledSpecifies that an input element should be disabled
hrefSpecifies the URL (web address) for a link
idSpecifies a unique id for an element
srcSpecifies the URL (web address) for an image
styleSpecifies an inline CSS style for an element
titleSpecifies extra information about an element (displayed as a tool tip)