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AI Alt Text Generator
Generate descriptive accessibility text for website graphics. This tool helps you automatically outline image contents for search engines and screen readers.
✓ Free✓ No signup✓ Privacy first✓ Runs in your browser
AI Alt Text Generator – ToolPremier
Requires a free Anthropic API key

This tool uses Claude's vision AI to generate accurate, WCAG-compliant alt text. Get a free API key at console.anthropic.com — your key is stored locally in your browser and never sent anywhere except Anthropic's API.

Drop images to generate alt text

Supports PNG, JPG, WEBP, GIF · Up to 15 images at once · Max 5MB each

Selected image preview
How it works
Convert in three steps

1. Upload graphic

Drag or select the website image file you want to describe.

2. Process description

The local vision model analyzes the objects, text, and layout within the file.

3. Copy accessibility tag

Read the generated description and copy the alt tag code.

FAQ
Common questions
The generator identifies primary objects, central actions, background settings, and prominent text within the image. It compiles these details into a descriptive, concise sentence optimized for screen readers. This helps make your site graphics accessible to visually impaired visitors.
While the model describes the image accurately, it does not automatically stuff keywords or brand phrases. You can edit the text output to insert specific target terms while maintaining helpful description structures. This ensures both accessibility compliance and search optimization.
The local vision model works best on clear web graphics, photos, and banners. It can misidentify abstract art, complex data charts, or low-contrast icons. It is recommended to review and adjust descriptions before inserting them into your HTML.
No, the vision model runs client-side inside your browser session. Your images, alt descriptions, and page URLs are not saved on databases or transmitted to servers, keeping your data private.
Keep going
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About the AI Alt Text Generator
The AI Alt Text Generator is a fast, reliable utility designed for web developers, content creators, and SEO professionals who need to write graphic tags. It offers a clean interface to compile descriptions without manual writing or using expensive cloud computing APIs. Whether optimization audits or accessibility reviews, the tool provides quick results.
Benefits
  • Improve search visibility - provide search engine index bots with accurate image descriptions to rank in search results.
  • Meet accessibility guidelines - write screen-reader-ready alt tags to align with global web accessibility specifications.
  • Accelerate content publishing - generate baseline descriptions quickly when uploading large batches of media files.
  • Audit web assets - find gaps in existing media galleries by generating descriptions for missing alt attributes.
Privacy
Calculations are processed entirely within the local web browser, meaning no graphics or generated descriptions are sent to external servers.