AI Alt Text Generator
Upload any image and instantly generate descriptive alt text using AI image captioning. Perfect for accessibility, SEO, and social media. Powered by Transformers.js — runs 100% in your browser. Your images never leave your device.
Drop an image here or click to upload
JPEG · PNG · WebP · GIF · BMP — up to 20 MB
How it works
Vision-Language AI
Uses a ViT-GPT2 image captioning model that understands image content and generates natural language descriptions.
100% Private
The AI model runs entirely in your browser via WebAssembly. Your images are never uploaded anywhere.
Accessibility Ready
Good alt text makes your content accessible to screen readers and helps people with visual impairments understand images.
SEO Benefit
Descriptive alt text helps search engines index your images, improving your site's visibility in image search results.
When to use alt text
Websites & blogs
Make every image on your site accessible and SEO-friendly
Social media
Twitter, Instagram, LinkedIn all support image alt text
Email campaigns
Alt text shows when images are blocked in email clients
E-commerce
Product image descriptions improve search rankings and accessibility
Documents
PDFs, presentations, and Word docs all benefit from image descriptions
Portfolios
Make your creative work discoverable by search engines
Also try: AI OCR — Extract Text | AI Background Removal | AI Image Upscaler