How to Add Alt Text to Images in WordPress

Learn how to add alt text to images in WordPress manually or automatically using the AI image alt text generator for WordPress.

About

What is AutoAlt.ai

AutoAlt.ai automatically generates alt text and image titles for your images.
Simply upload an image or provide a URL, and we’ll deliver optimized alt text based on the image content.

We offer multiple integration options tailored to your website setup. Check our Integrations page to see if we have a ready-to-use solution for your platform.

Video Tutorials

Explore how AutoAlt.ai works across different platforms. Watch step-by-step tutorials and plugin demos on our YouTube channel to quickly learn how to get started and make the most of our features.

Need Support?

Have questions or need help? Visit our Support Page to browse FAQs, watch helpful videos, or connect with our support team for personalized assistance.

Plugin Installation

WordPress

The Automatic Alt Text Generator for Images WordPress plugin makes it effortless to automatically generate ALT text and image titles for all your media. Whether you’re uploading new images or optimizing existing ones in the Media Library, this plugin ensures your content is always SEO-friendly and accessible—no manual effort required. It’s the easiest way to add alt text to images in WordPress automatically.

Installation

You can install the extension directly from our website Download.

  1. Go to Plugins > Add Plugin in your WordPress dashboard.
  2. Search for “Auto Alt AI”.
  3. From the search results, find the Auto Alt AI plugin.
  4. Click on the Install Now button, then click on the Activate button.

Setup

Connect your AutoAlt.ai plugin to your account using a secure API Key. Follow these steps:

  1. Visit https://autoalt.ai to sign up for a free trial or choose a paid plan.
  2. Copy your API key from your AutoAlt.ai account.
  3. Go to the plugin’s Settings page in WordPress and paste the API key to link your account.
  4. Upload an image – the plugin will automatically generate alt text for it.
AutoAlt.ai WordPress configuration screen showing API key input box and options for language and alt text settings in the dashboard.

Quick Start

The Automatic Alt Text Generator for Images plugin is designed to work seamlessly in the background, automatically generating ALT text and image titles for any new image you upload to your WordPress Media Library. It can also incorporate relevant SEO keywords to enhance your site’s visibility.

To customize how the plugin behaves, go to the Settings page under AutoAlt.ai in your WordPress admin dashboard.

When Images are Uploading

Within the plugin settings page, there is an option labeled “While Uploading New Images”. When enabled, the plugin will automatically generate alt text for newly uploaded images.
If WPML or Polylang is active, alt text will be generated for all configured languages.

Checkbox for auto-generating alt text is selected in an image uploading settings panel, highlighted in red, ensuring accessibility optimization.

Note

This option is Checked by default. If unchecked, automatic alt text generation for new images will be stopped.

Updating a Single Image

Simply open the image in your WordPress Media Library and click the “Generate Alt Text” button to quickly add alt text to the image that WordPress users need. The plugin will analyze the image and instantly generate optimized ALT text and title for it.

Sydney Opera House against a clear blue sky, located by the waterfront, showcasing its iconic architecture.

Bulk Generate Alt Text

This tool allows you to quickly generate ALT text for multiple images.
To access it, navigate to AutoAlt.ai → Bulk Generate from the WordPress admin menu.

You can refine which images are processed by applying the following filters:

  • Overwrite existing alt text
    Include images that already have ALT text. Enabling this will replace existing ALT attributes with new ones.
  • Attached to post
    Only process images that are attached to a post, page, or any custom post type. Unattached media files will be excluded.
  • Processed by AutoAlt.ai
    Skip images that have already been processed by AutoAlt.ai to avoid duplicate or unnecessary updates.
AutoAlt.ai dashboard showing alt text overview, 152 total images, with 133 missing alt text. Includes keyword input fields and generation options.
AutoAlt.ai dashboard for generating ALT text; 152 total images, 0 without ALT text, 578 credits available. Options for keywords and processing settings.

Info

Customize the generation by Including SEO keywords or Removing negative keywords to enhance the quality and relevance of the generated alt text.

Updating Multiple Images

From your Media Library list view, check the boxes next to the images you want to process. Then, open the “Bulk actions” dropdown, select “Generate Alt Text – AutoAlt”, and click Apply to automatically generate ALT text for all selected images.

WordPress media library interface showing options to generate alt text for images using AutoAlt.ai, with multiple image files listed.

Note

After clicking Apply, you’ll be redirected to the Bulk Generate screen, where you can generate ALT text for the selected images.

Quick Edit from History page

Go to the History page and quickly update alt text for any previously processed images. Simply review and edit the entries and click the “Update” button to save instantly.

The history of processed images is organized by generated languages, allowing you to easily update alt text based on your preferred language or specific requirements.

Dashboard interface showing AutoAlt.ai's list of generated alt texts for images, with a highlighted entry in a table format.

Note

Clicking the Update button allows you to modify existing alt text without deducting any credits from your account.

While Creating Alt Text for Images

When generating ALT text, you can choose to apply the same text to other image fields for consistency and improved SEO. The following options are available:

  • Set the image title using the generated alt text
    Automatically copy the generated ALT text into the image’s title field.
  • Set the image caption using the generated alt text
    Use the generated ALT text as the image’s caption, which can appear on the front end depending on your theme.
  • Set the image description using the generated alt text
    Populate the image’s description field with the same generated ALT text.
AutoAlt.ai dashboard interface for setting image title, caption, and description options for SEO optimization.

Note

This option are disabled by default. To activate this feature, please check the checkbox and save your settings.

Filter by Image Extension

The “Filter by Image Extension” feature helps you manage credits efficiently. For example, if you upload images in JPG or PNG format, but your website automatically converts them to WebP for performance optimization, it’s recommended to filter and select only the WebP format during processing. This ensures that credits are used only for the final images actually displayed on your site.

AutoAlt.ai settings panel for choosing image types to process, with options for PNG and JPG files and checkbox for skipping missing image files.

Include SEO Keywords

Automatically enhance your image ALT text using focus keywords from the post the image is associated with.

  • Use focus keywords to generate alt text (if available).
    When focus keywords are added to your post using SEO plugins like Yoast, All in One SEO, Rank Math, SEOPress, Squirrly, or SmartCrawl Pro, the plugin will automatically include those keywords in the generated ALT text.
  • Can’t find SEO keywords? Use the post title instead
    If a focus keyword isn’t available, the plugin will use the post title to generate meaningful alt text.
Checkbox options for including SEO keywords in alt text generation, compatible with WordPress SEO plugins like Yoast, Rank Math, and SEOPress.

Note

This options are disabled by default. To activate this feature, please check the checkbox and save your settings.

  • Make sure the image is added to or used within a post.
  • Focus keywords must be set for the post where the image is used.
  • To allow keyword detection, the image must be attached to the post in WordPress.

You can confirm this by viewing the image in the Media Library — it should show “Uploaded to: [Post Name]”. Unattached images will not inherit keywords automatically.

WooCommerce Images

ALT text for product images plays a key role in improving SEO and product visibility. To give you full control, the plugin provides flexible options for how ALT text is generated for WooCommerce product images:

  • Use the product name when generating alt text
    Automatically apply the WooCommerce product title as the base for generating ALT text for product images.
  • Use image title as product name (instead of WooCommerce product title)
    Use the image title as the primary source when generating ALT text.
    Recommended if your image titles provide better or more detailed descriptions than the product title.
WooCommerce settings page for AutoAlt.ai, focusing on product image optimization options like using product names for alt text generation.

Note

By default, these options are turned off. To enable them, select the checkbox for the option that best fits your product images and save your settings.

Staging Server Access

If you are using the extension on a local system or a staging server secured with an .htpasswd username and password, please ensure that this checkbox is unchecked for use extension functionality.

AutoAlt.ai developer settings page showing the "This site is publicly accessible on the internet" checkbox under Staging Configuration.

Note

By default, the “Access Image URL” option is enabled, assuming the site is accessible over the public internet.

Documentation FAQ

How can I update alt text for multiple images?

Option 1: Bulk Update via AutoAlt.ai

  • In your WordPress admin panel, go to AutoAlt.ai → Bulk Generate.
  • You’ll see a list of images missing alt text.
  • Click to generate alt text for all of them in bulk.

Option 2: Update from the Media Library

  • Switch to list view in the Media Library.
  • Select the images you want to update.
  • Choose AutoAlt.ai: Generate Alt Text from the Bulk Actions dropdown, then click Apply.
Can I update alt text for a single image?

Yes! Open the image in your WordPress Media Library. You’ll see a Generate ALT Text button. Clicking it will generate and set alt text for that image only.

Note: This will overwrite any existing alt text.

Can I include SEO keywords in the alt text?

Yes. AutoAlt.ai integrates seamlessly with popular SEO plugins like:

  • Yoast SEO
  • Rank Math
  • All in One SEO
  • Squirrly SEO
  • SEOPress

Just make sure your post has a focus keyword set. When you upload or update images within that post, AutoAlt.ai will intelligently incorporate the keywords into the alt text.

Do I own the alt text that is generated?

Absolutely. You retain full ownership of any alt text generated through AutoAlt.ai.

We do not:

  • Claim rights to your content
  • Use your alt text for AI training
  • Share it with third parties

Alt text is stored in your account for convenience only.

Will I lose my alt text if I uninstall the plugin?

No. Any alt text you’ve generated using AutoAlt.ai will remain on your images—even after uninstalling the plugin.

Does AutoAlt.ai support languages other than English?

Yes., AutoAlt.ai supports 100+ languages, making it ideal for multilingual websites.

Do you store the images I upload?

No, We do not store your images or binary files.
AutoAlt.ai only accesses:

  • Image URLs
  • Generated alt text
  • Any metadata you’ve provided
How do credits and pricing plans work?

We offer both subscription plans and one-time credit pack.

  • Standard image formats (JPG, PNG, GIF, WebP) use 1 credit per image.
  • 25 free credits are included for new accounts.
  • Unused credits roll over to the next billing cycle.
  • You can cancel at any time without losing your unused credits.
What happens if I cancel my subscription?

When you cancel:

  • Your subscription stops renewing automatically.
  • You won’t be charged further.
  • Any unused credits remain in your account.
Can I use AutoAlt.ai on multiple websites?

Yes, You can add as many websites as you want to your AutoAlt.ai account. Just add each domain to your account. As long as you have credits available, you can generate alt text across all sites.

What types of images are supported?

AutoAlt.ai supports all major formats:

  • JPG / JPEG
  • PNG
  • GIF
  • WebP

Requirements:
Image size under 16MB

Minimum dimensions of 50×50 pixels

Does AutoAlt.ai support SEO plugins?

Yes, AutoAlt.ai integrates with the following SEO plugins for keyword-optimized alt text:

  • Rank Math
  • Yoast SEO
  • All in One SEO
  • Squirrly SEO
  • SmartCrawl
  • SEOPress
Can I view my image processing history?

Yes, You can access your image processing history to:

  • Review previously generated alt text
  • Re-edit or update alt text at any time
What is alt text in WordPress and why is it important?

Alt text (alternative text) in WordPress describes an image’s content for search engines and screen readers. It improves SEO, accessibility, and helps your site meet WCAG standards. Optimized alt text also boosts visibility in Google Image Search.

How can I use an AI alt text generator in WordPress?

Install AutoAlt.ai, the best AI image alt text generator for WordPress. It scans your site, identifies missing alt text, and automatically generates SEO-friendly, ADA- and WCAG-compliant image descriptions — no manual work needed.

Does using AI-generated alt text improve SEO?

Yes. Descriptive and relevant AI-generated alt text helps search engines understand your images better, improving your site’s SEO rankings and image discoverability in Google and AI-powered searches.