Connor Bulmer

AI Auto Alt Text Generator is a lightweight, privacy-conscious plugin that uses OpenAI’s GPT-4o mini vision model 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 (five at a time) with a configurable pause between batches.</li>
<li>Prompt fine-tuning – supply site-wide context and optionally include the image file name.</li>
<li>Image size & detail control – choose the resolution and level of visual detail sent.</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 OpenAI’s gpt-4o-mini vision model.</li>
<li>GPT-4o 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 GPT-4o. </li>
<li>Image Size to Send – Thumbnail, Medium, Large, or Full. </li>
<li>Image Detail Quality – ‘Low’ or ‘High’. </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 five-image batches during bulk runs. </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>
</ul>
<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>

AI Auto Alt Text Generator

Automatically generates alt text and image titles for your WordPress media uploads with GPT-4o mini, improving accessibility and SEO.

AltTextLab

<h3>AltTextLab – AI-Powered Alt Text Generator for WordPress</h3>
AltTextLab helps website owners and online stores improve SEO and accessibility by automatically adding meaningful, descriptive alt text to all images. Powered by advanced AI, the plugin supports bulk alt text generation, allowing you to optimize hundreds of images in just minutes — no manual work required.
🔍 Automatic Alt Text Generation 
Every new image uploaded to your WordPress media library is analyzed and assigned AI-generated alt text that accurately reflects its content. It all happens automatically at upload — no extra effort needed.
⚡ Bulk Processing for Your Media Library 
Generate alt text for your entire WordPress media library in just a few clicks. Save hours of work with fast and reliable batch generation.
📁 Supports All Major Image Formats 
Compatible with JPG, PNG, WebP, SVG, and AVIF, ensuring full support for today’s most common and modern image formats.
🛍 WooCommerce Integration 
AltTextLab understands your product pages and smartly includes product names and brand in the alt text — boosting your store’s SEO performance.
🧩 SEO Plugin Integration 
Works seamlessly with popular SEO plugins like Yoast SEO, Rank Math, SEOPress, and others. Focus keyphrases are naturally included in the generated alt text.
🌍 Multi-language Support 
Generate alt text in over 130 languages.
🚀 Easy Start & Free Trial 
Get started in minutes with a simple installation and a free trial — no credit card required.
<h3>External service for alt text generation</h3>
This WordPress plugin connects to the API provided by <a href="https://www.alttextlab.com?utm_medium=integration&utm_source=wordpress&utm_campaign=marketplace&utm_content=external_service_block" rel="nofollow ugc">AltTextLab.com</a> to generate alt text for images using AI. This service is essential for the plugin’s core functionality.
What data is sent and when:
The plugin may send the following data to AltTextLab when generating alt text: 
– The image URL or a base64-encoded version of the image 
– Keywords 
– The article or product title 
– Brand and other relevant attributes, depending on plugin settings
The plugin may also send a request to fetch the current status of the connected AltTextLab account in order to display account information within the WordPress admin interface.
This external service is provided by AltTextLab.com. <a href="https://www.alttextlab.com/terms?utm_medium=integration&utm_source=wordpress&utm_campaign=marketplace&utm_content=external_service_block" rel="nofollow ugc">Terms of Service</a>, <a href="https://www.alttextlab.com/privacy-policy?utm_medium=integration&utm_source=wordpress&utm_campaign=marketplace&utm_content=external_service_block" rel="nofollow ugc">Privacy Policy</a>
<h3>Demo Video</h3>
<iframe loading="lazy" title="AI Alt Text Generator for WordPress | Bulk & Auto Generation | AltTextLab" width="750" height="422" src="https://www.youtube.com/embed/ZbE8yAbyeOk?feature=oembed" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>

AI Alt Text Generator for Images – AltTextLab

Automatically generate alt text for your images with AI — improve SEO and accessibility automatically.

AI Auto Alt Text Generator vs AI Alt Text Generator for Images – AltTextLab