About Alt Text Decision Tree & Anti-Pattern Auditor
Follow the W3C Alt Text Decision Tree to properly categorize decorative, informative, and functional images. Detect anti-patterns like "image of", filename extensions, and length overruns.
Key Capabilities & Features
- Interactive W3C Alt Text Decision Tree
- Anti-pattern auditor (detects "image of", filenames, stuffing)
- Character counter with 125-char screen reader threshold
- Generates semantic HTML <img>, <button>, and <figure> tags
- One-click markup copy
How to Use Alt Text Decision Tree & Anti-Pattern Auditor
Select Image Context
Categorize the graphic (informative, decorative, functional, chart).
Draft Description
Write a concise description focusing on content and purpose.
Verify & Copy
Resolve flagged anti-pattern warnings and copy semantic HTML.
Privacy & In-Browser Execution Guarantee
100% client-side text evaluation. Zero server calls.
Frequently Asked Questions
Should decorative images have an alt attribute?
Yes! Decorative images must have an empty alt attribute (alt="") so screen readers know to skip them. Omitting the alt attribute causes screen readers to read the image filename.
Why is "image of" an anti-pattern?
Screen readers automatically announce the presence of an image before reading the alt text, so writing "image of" makes the reader say "Graphic, image of a car".
What is the recommended alt text length?
Aim for 125 characters or fewer. JAWS and NVDA read alt text in chunks, and long descriptions should be placed in captions or body text instead.