Generate Alt Text and Captions with Jetpack AI in the Post Editor

Jetpack AI helps you generate alternative text and captions for your images, improving accessibility, content quality, and search engine visibility.

Requirements for using Jetpack AI to create alt text and captions

Jetpack AI-powered alt text and caption generation requires a website connected to Jetpack, using the block editor with Jetpack Blocks activated. For more details, check the Requirements.

The AI-powered alt text and caption generation only works for images in these formats: JPEG, PNG, WEBP, GIF.

Cost and Usage Limitations

Each AI-generated alt text or caption is counted as one AI request. Each successful generation counts as one request, whether you keep the result or not.

Jetpack AI offers you 20 free requests to get started. For more information about upgrading, please refer to our detailed Usage limitations and upgrades guide.

Use Jetpack AI to generate alt text and captions

Jetpack AI can automatically generate descriptive alt texts and captions for your images. This feature is integrated directly into the Image block and can be accessed via the block toolbar.

Here is how:

1. Select the Image block in the editor.
2. Click the AI Assistant Sparkles ✨ icon in the block toolbar.
3. Choose one or both of the options:
   • Generate alt text – AI will analyze the image and generate an alternative text. It will appear in the Alternative Text field in the sidebar Block settings.
   • Generate caption – AI will analyze the image and add a caption.
4. The generated text can be edited as needed before publishing your content.

Why Alt Text Matters

Alt text improves accessibility, SEO, and user experience.

• Accessibility: Screen readers use alt text to describe images to visually impaired users. This helps make websites more inclusive.
• SEO: Search engines rely on alt text to understand image content. Well-written alt text can improve rankings and helps images appear in search results.
• User experience: If an image doesn’t load, alt text provides context so users still understand the content.
• Compliance: Many accessibility guidelines, like WCAG, require alt text for images.