AI Image Caption Generator API — Auto-Generate Image Descriptions
Generate descriptive captions for any image URL. AI-powered image understanding at the edge. Perfect for accessibility, SEO, and content management. Free API.
What is AI Image Captioning?
AI image captioning uses computer vision models to generate natural language descriptions of images. The API takes an image URL and produces a descriptive caption that captures the content, objects, actions, and scene. Useful for accessibility (alt text), SEO (image metadata), content management, and social media automation.
How to Use It
Call GET /api/v1/ai-image-caption?url=https://example.com/image.jpg. Returns { caption: string, keywords: string[], confidence: number, error: string | null }.
Try it live
Test this endpoint in the interactive console
Open Console →
Frequently Asked Questions
What image formats are supported?
JPEG, PNG, GIF, and WebP images are supported. The image must be accessible via a public URL.