Image Captioner
Generate captions and alt text for images
About
Generate captions and alt text for images using AI. Choose from multiple styles — descriptive, concise, accessibility-focused alt-text, or social media with hashtags.
Supports batch processing for generating captions across entire image libraries or product catalogs at once.
API Endpoints
/caption /caption/batch /health How It Works
Image Input
Image URL submitted with a style parameter (descriptive, concise, alt-text, social).
Style Configuration
Caption style determines the prompt template and output constraints.
AI Captioning
LLM generates a caption based on the image analysis and style template.
Output
Caption returned with style metadata, ready for use in your application.
Use Cases
Accessibility Compliance
Auto-generate alt text for all images on your site to meet WCAG standards.
Social Media Posts
Generate engaging captions with relevant hashtags for social media images.
Product Descriptions
Create descriptive captions for product images in your catalog.
Media Library Tagging
Batch-process image libraries to add searchable descriptions and metadata.
Opens Aerostack dashboard to deploy this template
What's Included
Pipeline
Billing Model
metered
Pay per token used. Free tier included.