What is alternative text for images?

‘Alt text’ is a contraction of ‘alternative text’. It’s a short written description of an image, which makes sense of that image when it can’t be viewed for some reason. Well-written alt text is important to your website’s accessibility, and its search engine optimisation (SEO).

How do you write an alt text image?

Add alt text all non-decorative images. Keep it short and descriptive, like a tweet. Don’t include “image of” or “photo of”.

What attribute provides an alternate text for an image?

alt attribute
The required alt attribute specifies an alternate text for an image, if the image cannot be displayed. The alt attribute provides alternative information for an image if a user for some reason cannot view it (because of slow connection, an error in the src attribute, or if the user uses a screen reader).

How descriptive should alt text be?

While ALT tags need to be descriptive, they also need to be brief. They should not be full sentences or paragraphs. With a limit of about 125 characters, an ALT tag should provide enough detail for users and search engines to relate the image to the context of the page.

What’s the difference between alt text and image description?

What is an image description? An image description gives more details than alt text and allows someone to learn more about what is in an image that goes beyond alt text. Alt text gives the user the most important information while image descriptions provide further detail.

How to add alternate text to an image?

The Alt text attribute lets you create alternate text that can be read in lieu of viewing an illustration. ActualText is similar to Alt text in that it appears in lieu of an image. The ActualText attribute lets you substitute an image that is part of a word, such as using a fancy image for a drop cap.

What to do if an image does not have an alt attribute?

If an image does not have an alt attribute, a screen reader may announce the image’s src attribute instead. So, all images must have an alt attribute. When an image does not have alt text, provide a null alt attribute, like so: Developers can provide accessible names to images with the aria-label and aria-labelledby attributes.

How to write a description for an image?

Include descriptive text surrounding the image (such as the data table). Include a link to a separate page with a longer description. Test your alt text and descriptions by having someone review the content when the images are replaced with the alt text or descriptions.

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