Alt text (alternative text) for images is a crucial component of web design, particularly for accessibility. Alt text provides a textual description of an image, and it serves several important purposes:


Alt text is read by screen readers, which are assistive technologies used by people with visual impairments. By providing descriptive alt text, you make your content accessible to a wider audience.

SEO (Search Engine Optimization):

Search engines use alt text to understand the content of images. Descriptive alt text can improve the search engine rankings of your web pages and make your content more discoverable.

Context and Understanding:

Alt text provides context for images, helping users who may have images turned off in their browsers or those with slow internet connections to understand the purpose of the images.

Missing Image Replacement:

If an image fails to load, the alt text is displayed in its place, informing users about the content that should be there.

Decorative Images:

For images that are purely decorative and don’t convey important information, it’s best to use empty or null alt text to avoid screen readers unnecessarily announcing them.

Complex Images:

When dealing with complex images, consider providing more detailed alt text to convey the essential information. You can also use long descriptions or provide additional context within the content.

Remember to keep alt text concise, relevant, and descriptive. Avoid using generic phrases like “image” or “image of” and instead focus on conveying the meaningful content or function of the image. Always consider the context in which the image is used and the information it is intended to convey.