Connor Bulmer

AI Auto Alt Text Generator is a lightweight, privacy-conscious plugin that uses OpenAI vision-capable models (defaulting to GPT-5.4 nano, with GPT-5.4 mini and legacy GPT-4o mini options) to create meaningful, screen-reader-friendly alt text and SEO-friendly titles for your images. Whether you add a single image, bulk-process your library, or just want a one-click fix in the Media Library, the plugin handles it all – no manual effort required.
This solution is far cheaper than many alternatives because it cuts out the middle-person. You’ll just need to bring your own OpenAI API key.
<h3>✨ Key features</h3>
<ul>
<li>Automatic alt text on upload – set-and-forget accessibility.</li>
<li>Optional automatic image titles – improve SEO with descriptive titles.</li>
<li>One-click manual generation – “Generate Alt Text & Title” button in the Media Library.</li>
<li>Bulk update tool – batch-process existing images, including those that only have filename-based alt text, with a configurable pause between batches.</li>
<li>Prompt fine-tuning – supply site-wide context and optionally include the image file name.</li>
<li>Model selection – default to GPT-5.4 nano (fastest & cheapest) or switch to GPT-5.4 mini for higher quality; legacy GPT-4o mini and GPT-5 mini/nano remain available.</li>
<li>Image size & detail control – choose the resolution and level of visual detail sent.</li>
<li>Developer-friendly – filters and actions to customise prompts, models and output, plus optional outgoing webhooks.</li>
<li>WordPress Abilities API – registers a <code>generate-alt-text</code> ability (WordPress 6.9+/7.0) so core AI, agents and automation tools can generate alt text.</li>
<li>No extra servers – data flows only between your site and OpenAI; nothing is stored off-site.</li>
<li>Multilingual output – choose English (UK), English (US) or other popular languages. (English US is the default.)</li>
</ul>
<h3>🧭 Where to find the bulk tool</h3>
<ul>
<li>Tools → Bulk Alt Text Update</li>
<li>Media → Bulk Alt Text Update (shortcut that redirects to the Tools page)</li>
<li>Settings → Alt Text Generator includes a button linking straight to the bulk page</li>
</ul>
<h3>🧠 How it works</h3>
<ol>
<li>When an image is uploaded (or manually chosen), the plugin creates a temporary public URL for that image.</li>
<li>It sends the image – plus optional context such as the parent post title, your custom site context and the file name – to your selected OpenAI vision model.</li>
<li>OpenAI returns a concise description.
<ul>
<li>Alt text is stored in WordPress’ native <code>_wp_attachment_image_alt</code> field.</li>
<li>(Optional) The returned title is stored as the attachment post title.</li>
</ul>
</li>
<li>Nothing is cached or stored on OpenAI’s side; only the final strings live in your database.</li>
</ol>
<h3>Settings overview</h3>
<ul>
<li>OpenAI API Key – Required to connect to OpenAI.</li>
<li>OpenAI Model – GPT-5.4 nano (default), GPT-5.4 mini, or legacy GPT-4o mini / GPT-5 mini / GPT-5 nano.</li>
<li>Image Size to Send – Thumbnail, Medium, Large, or Full.</li>
<li>Image Detail Quality – ‘Low’ or ‘High’ (Low uses fewer tokens).</li>
<li>Bulk batch size – Number of images per batch (lower values reduce rate-limit risk).</li>
<li>Site Context – Optional free-form prompt guidance (brand voice, niche, etc.).</li>
<li>Send Image File Name – Include file name in the prompt for extra context.</li>
<li>Automatically Generate Title – Add descriptive titles alongside alt text.</li>
<li>Use full context for image titles – When enabled, title generation includes site context and file name (uses more tokens).</li>
<li>Bulk optimiser delay (seconds) – Pause between batches during bulk runs.</li>
<li>OpenAI request timeout (seconds) – Max wait time for OpenAI responses (10–120s) to reduce timeout failures on slower hosts.</li>
<li>Output Language – Default English (US). Choose English (UK) for British spellings or another popular language; outputs (alt text and titles) will be generated in the selected language.</li>
<li>Webhook URL & signing secret – Optionally POST generated alt text/titles to an external endpoint (with an optional HMAC-SHA256 signature) for automation and logging.</li>
</ul>
<h3>Developers</h3>
The plugin is extensible via standard WordPress hooks, an outgoing webhook, and the WordPress Abilities API.
Filters
<ul>
<li><code>aatg_alt_text_prompt</code> ( $prompt, $post_ID, $context ) – customise the alt-text prompt.</li>
<li><code>aatg_image_title_prompt</code> ( $prompt, $post_ID, $context ) – customise the title prompt.</li>
<li><code>aatg_openai_request_payload</code> ( $payload, $context, $messages ) – customise the full OpenAI request (model, messages, reasoning effort).</li>
<li><code>aatg_generated_alt_text</code> ( $alt_text, $post_ID ) – filter alt text before it is saved.</li>
<li><code>aatg_generated_title</code> ( $title, $post_ID ) – filter the title before it is saved.</li>
<li><code>aatg_is_low_quality_alt</code> ( $is_low, $alt, $post_ID ) – control which existing alt text the bulk tool regenerates.</li>
<li><code>aatg_webhook_payload</code> ( $payload, $post_ID, $result ) – customise the outgoing webhook body.</li>
<li><code>aatg_supported_image_extensions</code> ( $extensions ) – customise which image formats are sent to OpenAI (default: PNG, JPEG, GIF, WebP).</li>
</ul>
Actions
<ul>
<li><code>aatg_after_alt_text_generated</code> ( $post_ID, $alt_text )</li>
<li><code>aatg_after_title_generated</code> ( $post_ID, $title )</li>
<li><code>aatg_after_generation</code> ( $post_ID, $result )</li>
</ul>
Outgoing webhook
Set a Webhook URL under Settings → Integrations & Webhooks to receive a non-blocking JSON POST after each generation. If a signing secret is set, requests include an <code>X-AATG-Signature: sha256=…</code> header (HMAC-SHA256 of the body) so your endpoint can verify authenticity.
WordPress Abilities API
On WordPress 6.9+ the plugin registers the ability <code>ai-auto-alt-text/generate-alt-text</code> (input: <code>attachment_id</code>) so WordPress core AI, agents, MCP servers and automation tools can generate alt text programmatically. Execute it with <code>wp_get_ability( 'ai-auto-alt-text/generate-alt-text' )->execute( array( 'attachment_id' => 123 ) )</code>.
<h3>External services</h3>
This plugin connects to the OpenAI API to generate alt text and (optionally) image titles.
<ul>
<li>Endpoint: <code>https://api.openai.com/v1/chat/completions</code></li>
<li>When called:
<ul>
<li>On image upload (automatic)</li>
<li>Via “Generate Alt Text & Title” button in Media Library (manual)</li>
<li>Via Tools → Bulk Alt Text Update (bulk)</li>
</ul>
</li>
<li>Data sent: image URL, optional file name, optional site context, optional parent post title</li>
<li>Terms: <a href="https://openai.com/policies/terms-of-use" rel="nofollow ugc">https://openai.com/policies/terms-of-use</a></li>
<li>Privacy: <a href="https://openai.com/policies/privacy-policy" rel="nofollow ugc">https://openai.com/policies/privacy-policy</a></li>
</ul>
If you configure a Webhook URL, generated alt text/titles (and the image URL) are also sent to that endpoint you control.

AI Auto Alt Text Generator

Automatically generates alt text and image titles for your WordPress media uploads with selectable OpenAI models (defaulting to GPT-5.

KingAddons.com

Olga

Alex

AI SEO Tools leverages generative AI to automate and enhance your WordPress SEO. Features include: 
* Automatic image alt text generation. 
* Content Refresh & SEO Optimizer: Analyze and refresh old posts, suggest AI-powered updates, keywords, and meta descriptions. 
* Auto Tagging for Posts: Automatically generate semantically relevant tags. 
* Bulk Alt Text Generation: Generate alt text for multiple images in bulk with configurable delay and detail level. 
* Bulk Tagging: Process multiple posts for auto-tagging in bulk. 
* Bulk Append Tags: Append new AI-generated tags to posts with existing tags. 
* Bulk Regenerate Tags: Regenerate tags for posts to keep metadata fresh. 
* Custom Alt Text Language: Generate alt text in any specified language (e.g., Spanish, French). 
* Custom Alt Text Prompt: Customize the AI prompt for alt text generation. 
* Dynamic OpenAI Model Selection: Choose vision models, refresh the model list, and cache results.
Enjoy all AI features at OpenAI cost, with no additional fees from us!
<h3>Automatic Image Alt Text Generator</h3>
Summary: This module automatically generates descriptive alt text for your Media Library images using AI, improving accessibility and SEO.
Return Value: The generated alt text is saved to each image’s ALT attribute.
Examples: 
* Enable the Alt Text Generator module in Settings -> AI SEO Tools. 
* Visit the Alt Text Generator tab to view statistics and generate alt text for one or all images.
<h3>Content Refresh & SEO Optimizer</h3>
Summary: This module uses generative AI to analyze your existing posts and suggest updates or rewrites for outdated sections, recommend low-competition keywords, and auto-generate meta descriptions or summaries. It helps keep your content up-to-date and SEO-friendly, saving hours of manual editing and improving your site’s search rankings.
Return Value: AI-powered content suggestions for your posts.
Examples: 
– Enable the module in the plugin settings. 
– Visit the Content Refresh tab for more information and future controls.
<h3>Auto Tagging</h3>
Summary: Automatically generate semantically relevant tags for your posts using AI to enhance metadata and internal linking.
Return Value: AI-generated tags applied to each post.
Examples: 
* Enable the Auto Tagging module in Settings -> AI SEO Tools. 
* Visit the Auto Tagging tab to bulk tag your published posts.
<h3>Bulk Processing Overview</h3>
Summary: Perform bulk operations for alt text generation, tagging, appending tags, and regenerating tags with progress feedback.
Settings: 
* Bulk Processing Delay: Seconds to wait between API calls to avoid rate limits. 
* Image Detail Level: Controls granularity of analysis (‘low’ or ‘high’).
Examples: 
* In the Alt Text Generator tab, click ‘Start Bulk Generation’ to process multiple images. 
* In the Auto Tagging tab, click ‘Start Bulk Tagging’, ‘Start Bulk Append’, or ‘Start Bulk Regenerate’ as needed.
<h3>Customization</h3>
Summary: Customize alt text language, prompt, and OpenAI model selection for fine-tuned AI behavior.
Settings: 
* Custom Alt Text Language: Generate alt text in any specified language. 
* Custom Alt Text Prompt: Provide a custom prompt for alt text generation. 
* Dynamic OpenAI Model Selection: Choose the model and refresh the available list.
Examples: 
* Check ‘Generate alt text in a non-English language’ and enter ‘German’. 
* Click the ‘Refresh List’ button next to the Model selection in Settings to update available models.
<h3>External services</h3>
This plugin connects to the OpenAI API (https://api.openai.com) to generate AI-powered content for alt text, content refresh suggestions, and post tagging. 
– What data is sent: It sends your image metadata (for alt text), post content (for suggestions), and any custom prompts or language preferences you have configured. 
– When: Data is sent when you manually generate alt text, initiate bulk generation, analyze content refresh, or generate/append/regenerate tags. 
– Why: AI processing is performed by OpenAI models to provide advanced SEO and accessibility enhancements. 
– Service provider: OpenAI Inc. 
 – Terms of Use: https://openai.com/policies/terms-of-use 
 – Privacy Policy: https://openai.com/policies/privacy-policy

AI SEO Tools

AI SEO Tools uses AI to automatically improve your site's SEO, including generating image alt text, content refresh and auto tagging.

AI Auto Alt Text Generator vs AI SEO Tools