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.

Mauricio Altamirano

Pagemachine

wptali

AiGude Tools improves accessibility and SEO by automatically generating alternative text for your images using an AI-powered API. 
Save time, stay consistent, and enhance your site’s visibility in search engines — all without manually writing every alt text.
Note: An AiGude API key is required; get one free at <a href="https://aigude.io" rel="nofollow ugc">AiGude.io</a>.
<a href="https://www.pagemachine.de/ki-loesungen/aigude-faq" rel="nofollow ugc">AiGude FAQ (German)</a>
<h3>Key Features</h3>
<ul>
<li>AI-Powered Alt Text – Automatically generate descriptive alt text for your images using advanced AI.</li>
<li>Multilingual Support – Translate prompts and alt texts via DeepL or Google Cloud Translation with one click.</li>
<li>List View – Work through your Media Library in a powerful list interface:
<ul>
<li>Search images by filename, title, or existing alt text</li>
<li>Bulk-generate alt text for selected images (per page or across pages)</li>
<li>Skip existing alt text or overwrite with new results</li>
<li>Preview and edit a single image’s alt text before saving</li>
<li>Select prompt templates and target languages for single or bulk actions</li>
</ul>
</li>
<li>Grid View – Generate alt text directly from the Media Library’s grid:
<ul>
<li>Quickly select multiple images</li>
<li>Mini-grid shows your current selection</li>
<li>Hover tooltips reveal generated alt text at a glance</li>
</ul>
</li>
<li>Prompts – Create template-driven prompts with placeholders (e.g., <code>%filename%</code>, <code>%title%</code>) and lock provider-specific target languages.</li>
<li>Settings – Manage API keys, view remaining credits, and pick translation providers in one place.</li>
</ul>
Perfect for website owners, photographers, agencies, and content teams who want to improve accessibility and SEO without hours of manual work.
<h3>Data Processing and Privacy</h3>
This plugin connects to AiGude’s captioning service to generate and translate image alternative text.
<ul>
<li>Images and texts are transmitted to the service for processing.
<ul>
<li>We do not store images after processing; they are held only in memory long enough to generate a response.</li>
</ul>
</li>
<li>Alt-text generation is performed on AiGude–managed infrastructure located in the European Union. Image files are sent over HTTPS to this infrastructure. No third-party vendors are used for alt-text generation.</li>
</ul>
Privacy Info: 
– <a href="https://aigude.io/Informationen/Datenschutz" rel="nofollow ugc">AiGude Privacy Policy</a> 
– <a href="https://aigude.io/Informationen/AGB" rel="nofollow ugc">AiGude Terms of Service</a> 
– <a href="https://www.pagemachine.de/ki-loesungen/aigude-faq" rel="nofollow ugc">AiGude FAQ (German)</a>
Translations may be performed via the DeepL API or the Google Cloud Translation API, depending on your configuration.
<ul>
<li>
DeepL API
<ul>
<li>Only the text to be translated and the selected language parameters are transmitted to DeepL.</li>
<li>DeepL is headquartered in Germany and operates under EU GDPR standards.</li>
<li>For details, see the <a href="https://www.deepl.com/privacy" rel="nofollow ugc">DeepL Privacy Policy</a>.</li>
</ul>
</li>
<li>
Google Cloud Translation API
<ul>
<li>Only the text to be translated and the selected language parameters are transmitted to Google.</li>
<li>We use the Google Cloud Translation API v3 with the dedicated EU endpoint <code>translate-eu.googleapis.com</code>; see Google’s <a href="https://docs.cloud.google.com/translate/docs/advanced/endpoints" rel="nofollow ugc">endpoint documentation</a> for details.</li>
<li>For more information on how Google handles translation data, see Google’s <a href="https://cloud.google.com/translate/data-usage" rel="nofollow ugc">Data Usage FAQ</a>.</li>
</ul>
</li>
</ul>

AiGude Tools

Generate and manage image alt text with AI — featuring bulk actions, multilingual prompts, and seamless Media Library integration.

AI Auto Alt Text Generator vs AiGude Tools