AI-powered alt text generation for any image. Make your website accessible and boost SEO. API, Chrome extension, WordPress plugin.
POST an image URL, get back a concise description. One endpoint, JSON response, API key auth.
Add a "Generate Alt-Text" button to any image on any web page. Right-click and done.
Bulk-generate alt text for your entire media library. One click fills missing alt attributes.
Tiered limits: 100/day free, 10K/day pro, 100K/day ultra. Automatic usage tracking.
WCAG-compliant descriptions under 125 characters. Screen-reader ready out of the box.
Use OpenAI Vision for production, or Ollama (LLaVA) for a free self-hosted option.
# Generate alt text via API
curl -X POST https://api.alttext.ai/generate \
-H "X-API-Key: YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{"image_url": "https://example.com/photo.jpg"}'
# Response
{
"alt_text": "A golden retriever sitting on grass in a sunny park",
"image_url": "https://example.com/photo.jpg",
"model": "openai",
"created_at": "2026-08-27T12:00:00Z"
}