AI Alt Text Generator
Generate alt text for images using OpenAI's vision API. Upload an image, enter your API key, and get a concise, WCAG-compliant alt text suggestion. Your API key is used directly from your browser and never sent to our server. Always review AI-generated text before publishing.
How it works: Your OpenAI API key is used directly from your browser to generate alt text. It is never sent to our server, stored, or shared. You need an OpenAI account with API credits.Get your API key →
Drop images here or click to upload
PNG, JPG, GIF, WebP — max 4MB each — batch upload supported
Best practices for alt text:
- • Be concise: 100-125 characters max for most images
- • Describe the purpose of the image, not just what it shows
- • For decorative images, use empty alt (alt="")
- • For data charts, summarize the key finding
- • Always review AI-generated text before publishing
- • Supports 30+ languages — select your output language above
- • Batch upload: drag multiple images or select multiple files
Why This Matters
Writing alt text manually doesn't scale — most websites have hundreds or thousands of images. AI alt text generation helps bridge this gap by producing descriptive, context-aware text alternatives. It supports 30+ languages and batch processing. Always review AI-generated content before publishing.
How to Use This Tool
- 1
Enter API key
Paste your OpenAI API key. It's used directly from your browser and never sent to our server.
- 2
Choose language and detail
Select from 30+ output languages and 3 detail levels (concise, detailed, comprehensive).
- 3
Upload images
Drag and drop or select multiple images for batch generation.
- 4
Generate and review
Click generate, then review each alt text. Copy individual results or download all as CSV.
Frequently Asked Questions
You need an OpenAI account with API credits. The tool uses your own API key directly, so there's no subscription or platform fee. Each image costs approximately $0.01-0.03 depending on the detail level.