Gadget-AutoImageAltText

Auto Image Alt Text

Adds a ✨ Generate Alt Text button to the media dialog in VisualEditor. When clicked, it fetches the selected image and uses AI vision to generate a descriptive, meaningful alt text — improving accessibility without manual effort.

Usage

1. Add the following line to MediaWiki:Gadgets-definition: * AutoImageAltText[ResourceLoader|default|messages=bs-ai-alt-text-button,bs-ai-alt-text-loading,bs-ai-alt-text-filename-error,bs-ai-alt-text-fetching,bs-ai-alt-text-success,bs-ai-alt-text-error]|AutoImageAltText.js
2. Enable this gadget in Special:Preferences → Gadgets.
3. Open a page in VisualEditor.
4. Insert or edit an image to open the media dialog.
5. Click ✨ Generate Alt Text next to the alt text field.
6. The AI-generated description is filled in automatically and can be edited before saving.

Requirements

• VisualEditor must be active.
• The image must be accessible via a public URL resolvable by the AI service.
• The AI service endpoint must support vision/image input and must be configured in the wiki's environment settings.

Message keys

The following system messages can be translated by creating MediaWiki:<key>/<language-code> pages:

Key	Default (English)
bs-ai-alt-text-button	✨ Generate Alt Text
bs-ai-alt-text-loading	⏳ Generating...
bs-ai-alt-text-filename-error	Could not extract filename from URL
bs-ai-alt-text-fetching	Fetching image and generating alt text...
bs-ai-alt-text-success	Alt text generated successfully!
bs-ai-alt-text-error	Failed to generate alt text: $1

Ein Uniform Resource Locator (Abk. URL; englisch für „einheitlicher Ressourcenverorter“) identifiziert und lokalisiert eine Ressource, beispielsweise eine Webseite, über die zu verwendende Zugriffsmethode (zum Beispiel das verwendete Netzwerkprotokoll wie HTTP oder FTP) und den Ort (englisch location) der Ressource in Computernetzwerken.