Lumatag Alt Text Generator adds AI-written alt text to images in the WordPress media library, aimed at site owners who want more accessible and descriptive image tagging without doing it by hand.
It works on individual images, either automatically as they are uploaded or on demand for images already sitting in the library, making it useful for anyone maintaining a site where alt text has been inconsistent or missing.
The plugin connects to an AI provider chosen by the site owner: OpenAI, Anthropic Claude, or Google Cloud Vision. Each of these requires an API key supplied by the site owner in the plugin’s settings, and that provider may charge for the usage involved.
When alt text generation is triggered, the plugin sends the image, encoded as base64, along with a text prompt to the selected provider’s API, which returns a description. That description then appears in WordPress for review before it is saved to the image.
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Key Features of Lumatag Alt Text Generator
Automatic generation on upload. When an image is uploaded to the media library, the plugin can send it to the configured AI provider right away and produce alt text without any manual step. This helps keep new images tagged consistently as they are added to a site.
On-demand generation button. A generate button is available directly in the Media Library for existing images, letting a site owner request AI-written alt text for any image at any time. This is useful for filling gaps in older content without reprocessing an entire library at once.
Review before saving. Alt text produced by the AI provider is shown for review rather than written straight to the image record. Site owners keep final control over what gets published, and can edit or reject a suggestion before it is saved.
Choice of AI provider. Support for OpenAI, Anthropic Claude, and Google Cloud Vision means a site owner can pick the provider whose API key they already hold or prefer to use. Switching providers is handled through the plugin’s settings rather than requiring a different plugin.
How to Install Lumatag Alt Text Generator
Step 1: Install the plugin. From the WordPress dashboard, go to Plugins > Add New Plugin and search for Lumatag Alt Text Generator. Click Install Now, then Activate once installation finishes.
Step 2: Add an API key. Go to Settings > Lumatag and enter the API key for the AI provider you want to use, whether OpenAI, Anthropic, or Google Vision.
Step 3: Generate alt text. Upload a new image with automatic generation turned on, or open an existing image in the Media Library and click the generate button to request AI-written alt text.
Step 4: Review the result. Check the suggested alt text before saving it, since generation always stops at a review step so you have final say over what is stored.
Good to Know About Lumatag Alt Text Generator
The developer notes that an API key from the chosen AI provider is required, since the plugin does not include its own managed service and generation stops if no key is configured. Generated alt text is never saved automatically; it is presented for review first, giving the site owner a chance to edit or discard it.
According to the documentation, the plugin only contacts an AI provider when a user action triggers it, such as an upload with automatic generation enabled or a manual generate click, and it runs independently of Yoast SEO if that plugin is not installed.
Download Lumatag Alt Text Generator on WordPress.org