Filestack Alt Text Generator

Filestack Alt Text Generator creates descriptive alt text for your WordPress images using the Filestack Caption API. Improve your site’s accessibility and SEO with AI-generated image descriptions, individually or in bulk.

Features

• Bulk Processing: Generate alt text for all images at once with a single click
• Smart Detection: Processes only images missing alt text. Your manual entries stay intact.
• Real-time Progress: Live progress bar shows exactly how many images have been processed
• Media Library Integration:
  • Alt text status column showing which images need attention
  • Bulk action to generate alt text for selected images
  • Generate button on individual image edit screens
• Pause & Resume: Ability to pause processing and resume later
• Error Handling: Logs errors automatically and continues processing. Get a full summary of processed, skipped, and error counts when complete.
• Secure API Storage: Safely stores your Filestack credentials using WordPress options API, with masked API key field
• Test Connection: Verify your API credentials before processing
• WordPress.com CDN Proxy: Optional setting to proxy image URLs through the WordPress.com CDN (i0.wp.com) for sites where images are not directly accessible by the Filestack API

How It Works

1. Install and activate the plugin
2. Configure your Filestack API credentials in Settings > Filestack Alt Text
3. Test your API connection to ensure everything works
4. Navigate to Media > Generate Alt Text to process images in bulk
5. Or use the bulk actions in the Media Library to process specific images

Requirements

• WordPress 5.8 or higher
• PHP 7.4 or higher
• Filestack API account with API Key, Policy, and Signature

External services

This plugin relies on the Filestack Caption API to generate alt text for images.

What data is sent and when

• When you generate alt text (individually, in bulk, or via the “Test Connection” button), the plugin sends the public URL of each image to the Filestack Caption API.
• The API endpoint used is https://cdn.filestackcontent.com. Your configured API Key, Policy, and Signature are included in the request URL for authentication.
• No other user data or site data is transmitted.

Service links

• Filestack website: https://www.filestack.com/
• Terms of service: https://www.filestack.com/terms/
• Privacy policy: https://www.filestack.com/privacy/

Support

For support, please visit the plugin’s support forum on WordPress.org or contact your plugin developer.