Accessible Image Alt-Text Generator & WCAG Builder

The Rules of WCAG 2.1 Non-Text Content Compliance

Alternative text (alt text) serves three distinct functions: it allows visually impaired users with screen readers (NVDA, VoiceOver, JAWS) to understand visual content, displays when images fail to load due to network constraints, and provides search engine bots with semantic indexation cues.

According to W3C Web Accessibility Initiative (WAI) guidelines, effective alt text should be concise (ideally under 125 characters) and descriptive without stating the obvious. Screen readers announce the presence of an image automatically; writing 'Photo of a...' or 'Image showing...' introduces annoying vocal redundancy for assistive tech users.

Handling Decorative Elements vs. Informative Graphics and Charts

Not every image on a website requires a descriptive alt text string. Purely decorative elements—such as abstract background blobs, geometric divider lines, or visual icons accompanying explicit text labels—should have an empty alt attribute (`alt=""`) combined with `aria-hidden="true"`.

Conversely, data charts and infographics must summarize the key takeaway or trend rather than describing individual bar pixel heights. If an image contains rendered text (such as a promotion banner), that text must be included verbatim in the alt description.

Step by step: how to use Alt-Text Builder

1. 1

   Select your image purpose (Informative Photo, Chart/Infographic, UI Icon, Brand Logo, or Decorative).

2. 2

   Enter the primary subject or focal point of the image.

3. 3

   Describe the specific action, state, or key finding represented.

4. 4

   Optionally add context or environment details to clarify relevance.

5. 5

   If the graphic contains rendered typography, enter the exact embedded text.

6. 6

   Verify the character count against the 125-character WCAG warning meter.

7. 7

   Copy your preferred code snippet (HTML `<img>`, JSX, or Markdown).

Frequently asked questions