Alt Text Generator

What is Alt Text Generator?

Alt Text Generator creates descriptive alternative text for images following WCAG 2.1 accessibility guidelines. It produces concise, meaningful descriptions that convey the purpose and content of an image to screen reader users. The tool distinguishes between informative images that need detailed descriptions, decorative images that should use empty alt attributes, and functional images like buttons that need action-oriented text. It also flags common mistakes like starting with 'image of' or 'picture of' which screen readers already announce.

Web developers meeting accessibility compliance requirements, content managers updating CMS image libraries, and SEO specialists improving image search rankings. The tool runs entirely in your browser — your data never leaves your device.

How to Use Alt Text Generator

1. Upload an image or provide its URL to analyze the visual content
2. Select the image type — informative, decorative, functional, or complex
3. Review the generated alt text and adjust for context-specific details the tool may miss
4. Copy the alt text and add it to your HTML img tag or CMS image field

Common Use Cases

• Writing alt text for e-commerce product images that describes color, size, and material
• Generating accessible descriptions for infographics and chart images in blog posts
• Creating alt text for social media images to improve accessibility and SEO simultaneously
• Auditing existing website images for missing or inadequate alt attributes

Pro Tips

• Keep alt text under 125 characters — screen readers like JAWS and NVDA may truncate longer text or read it awkwardly across line breaks
• For complex images like charts, use a short alt attribute plus a longer figcaption or aria-describedby for the full data
• Decorative images (borders, spacers, background textures) should have alt="" — an empty attribute, not a missing one — so screen readers skip them entirely

Why Use This Tool?

• Privacy-first: All processing happens locally in your browser. No data is transmitted to any server.
• No installation required: Works in any modern browser on desktop or mobile.
• Completely free: No account, no credit card, no usage caps.
• Fast and reliable: Powered by modern Web APIs for near-instant results.

Related Concepts

Learn more about related topics: WCAG 2.1, Screen reader, ARIA attributes, Image SEO.

Frequently Asked Questions