How Long Should Image Alt Text Be. The images on your page should be relevant to your pages content so describe them with an alt tag naturally will add relevance. Image alt text might be invisible to most of us except screen readers and search engines but that doesn t mean it s not important.
The length is not important but i would not stuff they will a long list of keywords. According to w3c accessibility guidelines for code to be considered w3c valid it is important to include both image alt text and image title text in the image for important images on the page. Complex images like charts or graphs should have long description located near the image.
Decorative images should have blank or empty alt text.
The accessibility of the web in general would increase dramatically if alternative text were provided and implemented correctly. Alt text should therefore be short enough to reasonably fit within the space allocated for the image. Alt text alternative text also known as alt attributes describe the appearance and function of an image on a page. For complex images such as charts graphs and diagrams that require more lengthy descriptions there are other options.