nixtool

Nix Image Optimizer helps optimize your WordPress media library by converting supported image uploads to WebP automatically and giving you tools to manage existing images, generate lightweight featured images, and improve image SEO metadata.
Features:
<ul>
<li>Automatically converts new JPG, JPEG, PNG, and AVIF uploads to WebP.</li>
<li>Bulk-compresses existing Media Library images.</li>
<li>Shows compression statistics in a Media Log.</li>
<li>Adds optional watermark support before compression.</li>
<li>Generates blog-style featured images from post title, category, author name, and avatar.</li>
<li>Supports custom featured image background colors, gradients, typography, and output dimensions.</li>
<li>Auto-fills missing image ALT text and attachment descriptions from post content.</li>
<li>Includes Basic and Advanced Image SEO Metadata modes.</li>
<li>Scans and backfills existing posts with safe generated-metadata rules.</li>
<li>Includes an unused media scanner and cleaner.</li>
<li>Works with WordPress Media Library metadata and regeneration flow.</li>
</ul>
<h3>External services</h3>
This plugin can connect to the WordPress avatar system, which commonly uses Gravatar, when the Featured Image Generator is configured to include the post author’s avatar.
When the avatar option is enabled, the plugin requests the author’s avatar URL while showing the featured-image preview in the WordPress admin and while generating a featured image for a post or page. WordPress builds that avatar URL from the author’s user account email address according to the site’s normal avatar settings. The plugin downloads the avatar image from that URL so it can draw the circular author avatar into the generated featured image. If the avatar option is disabled, or if no avatar URL is available, the plugin does not request the avatar image and uses a local placeholder shape instead.
The avatar service is provided by Gravatar/Automattic: 
Terms of Service: https://wordpress.com/tos/ 
Privacy Policy: https://automattic.com/privacy/

Nix Image Optimizer

Convert images to WebP with bulk compression, media log, watermarking, image SEO, featured image generation, and unused media cleanup.

Arun Basil Lal

Automatically add Image attributes such as Image Alt Text, Image Title, Image Caption and Image Description from Image Filename.
The plugin can update image attributes for both new image uploads and existing images in the media library. Great for Image SEO and Accessibility.
<iframe loading="lazy" class="youtube-player" width="750" height="422" src="https://www.youtube.com/embed/V5SOU4okOfU?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en-US&autohide=2&wmode=transparent" allowfullscreen="true" style="border:0;" sandbox="allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox"></iframe>
Image alt text and title is critical for your image SEO and will help users discover your images (and there by your website) in Google / Yahoo / Bing image search.
<blockquote>
Life-Saver 
 It allowed me to save tons of time. Further, the support is nice and ready to help. 
 – <a href="https://wordpress.org/support/topic/life-saver-188/" rel="ugc">thnk4</a>
</blockquote>
Proper alt text also helps people who are blind or who have low vision understand your images there by improving the accessibility of your website. This will open up your website to a new segment of visitors and increase your traffic.
<blockquote>
Wow! 
 If I could give this 1 more star I would! 
 – <a href="https://wordpress.org/support/topic/wow-550/" rel="ugc">jdev</a>
</blockquote>
With this plugin you can:
<ul>
<li>Set the image filename as the image Title.</li>
<li>Set the image filename as the image Caption.</li>
<li>Set the image filename as the image Description.</li>
<li>Set the image filename as the image Alt Text. This was a default feature in WordPress before 4.7. The plugin restores this essential feature which is great for SEO.</li>
<li>Insert Image Title into post HTML. WordPress stopped adding Image Titles to images since WordPress 3.5. The plugin restores it.</li>
<li>Remove hyphens from the image filename.</li>
<li>Remove underscores from the image filename.</li>
<li>Remove full stops from filename.</li>
<li>Remove commas from filename.</li>
<li>Remove all numbers from filename.</li>
<li>Choose to turn off any of the above mentioned features.</li>
<li>Display image attributes as columns in Media Library list view.</li>
</ul>
With the bulk updater you can:
<ul>
<li>Set the image filename as image Title, Caption, Description and Alt Text after removing hyphens and underscores from the filename.</li>
<li>Update any number of images in your Media Library in one click.</li>
</ul>
If your image filename is My_image-name.jpg, your Image Title, Caption, Description And Alt Text will be My image name.
The plugin settings and bulk updater are in WordPress Admin > Settings > Image Attributes. Here you can choose which attributes to update for NEW uploads.
Please remember to take a database backup before running the bulk updater (or anything bulk in general). The bulk updater updates ALL attributes for existing images in the Media Library and ignores the settings set for NEW uploads.
<h3>Image Attributes Pro</h3>
A pro add-on is now available for the plugin. Check out <a href="https://imageattributespro.com/?utm_source=wordpress.org&utm_medium=readme" rel="nofollow ugc">Image Attributes Pro</a>.
The pro add-on can update the image attributes from not just the image filename, but also from the post / page / product / custom post type title. You can fine tune the bulk updater settings and even clean up the actual image filename.
<blockquote>
Thank you so much for all your help in trying to fix this, its very much appreciated indeed. You’ve gone above and beyond what I was expecting in support! 
 Rest assured I will give great feedback on your plugin anywhere I can!! 
 – James Barber, for <a href="https://imageattributespro.com/?utm_source=wordpress.org&utm_medium=readme" rel="nofollow ugc">Image Attributes Pro</a> via email.
</blockquote>
What the pro add-on you get these additional features:
<ul>
<li>Use post title as title text. If image is not attached to a post, image filename will be used instead.</li>
<li>Use post title as alt text. If image is not attached to a post, image filename will be used instead.</li>
<li>Use post title as caption. If image is not attached to a post, image filename will be used instead.</li>
<li>Use post title as description. If image is not attached to a post, image filename will be used instead.</li>
<li>Build your own attributes using custom tags like <code>%filename%</code>, <code>%posttitle%</code>, <code>%sitetitle%</code>, <code>%category%</code>, <code>%tag%</code>, <code>%wc_variation%</code>, <code>%yoastfocuskw%</code>, <code>%yoastseotitle%</code>, <code>%rankmathfocuskw%</code>, <code>%seopresstargetkw%</code> and <a href="https://imageattributespro.com/custom-image-attribute-tags/?utm_source=wordpress.org&utm_medium=readme" rel="nofollow ugc">many more</a>. Each custom tag will be replaced with it’s value. You can combine them as you please!</li>
<li>Use Yoast Focus Keyword and Rank Math Focus Keyword as image attributes.</li>
<li>Clear any image attribute by setting it as blank / empty. </li>
<li>Exclude images from Bulk Updater. A meta box and a checkbox is added to the <code>Media Library</code> > <code>Edit Media</code> sidebar. When checked, the bulk updater will not update the attributes of that image in the media library or in posts / products where the image is used. </li>
<li>Remove apostrophe ( ‘ ) from filename</li>
<li>Remove tilde ( ~ ) from filename</li>
<li>Remove plus ( + ) from filename</li>
<li>Remove pound ( # ) from filename</li>
<li>Remove ampersand ( & ) from filename</li>
<li>Remove round brackets ( ( ) ) from filename</li>
<li>Remove square brackets ( [ ] ) from filename</li>
<li>Remove curly brackets ( { } ) from filename</li>
<li>Filter words or characters from filename</li>
<li>Filter filename with regex</li>
<li>convert image attributes to lowercase</li>
<li>CONVERT IMAGE ATTRIBUTES TO UPPERCASE</li>
<li>Use title casing for image attributes. First Letter Of Each Word Will Be Capitalized.</li>
<li>Use sentence casing for image attributes. First letter of a sentence will be capitalized.</li>
<li>Clean the actual image filename after upload.</li>
<li>Choose to turn off any of the above mentioned features.</li>
</ul>
With the Image Attributes Pro bulk updater you can:
<ul>
<li>Update image title and alt text for images inserted into posts and custom post types. Not just the media library. <a href="https://imageattributespro.com/how-wordpress-store-image-attributes/?utm_source=wordpress.org&utm_medium=readme" rel="nofollow ugc">What is the difference?</a></li>
<li>Fine tune all settings. Choose what to update.</li>
<li>Update image titles / alt text in media library and / or existing posts.</li>
<li>Update image titles / alt text in media library and / or existing posts only if no title / alt text is set. Existing image titles / alt text will be preserved.</li>
<li>Update image caption and description in the media library. Existing image captions and descriptions can be preserved.</li>
<li>Build your own attributes using custom tags like <code>%filename%</code>, <code>%posttitle%</code>, <code>%sitetitle%</code>, <code>%category%</code>, <code>%tag%</code>, <code>%yoastfocuskw%</code>, <code>%yoastseotitle%</code>, <code>%rankmathfocuskw%</code>, <code>%seopresstargetkw%</code> and <a href="https://imageattributespro.com/custom-image-attribute-tags/?utm_source=wordpress.org&utm_medium=readme" rel="nofollow ugc">many more</a>. Each custom tag will be replaced with it’s value. You can combine them as you please!</li>
<li>Choose to turn off any of the above mentioned features.</li>
<li>Choose specific post types to bulk update.</li>
<li>Bulk update image attributes in <a href="https://imageattributespro.com/acf-compatibility/?utm_source=wordpress.org&utm_medium=readme" rel="nofollow ugc">ACF’s WYSIWYG Editor</a> and <a href="https://imageattributespro.com/divi-compatibility/?utm_source=wordpress.org&utm_medium=readme" rel="nofollow ugc">Divi theme</a>.</li>
<li>Modify auto generated image attributes using the <a href="https://imageattributespro.com/codex/iaffpro_image_attributes/?utm_source=wordpress.org&utm_medium=readme" rel="nofollow ugc">iaffpro_image_attributes filter</a>.</li>
<li>Disable updating of attributes in media library completely and just updated attributes in Post HTML or vice versa.</li>
<li>Add or remove custom image attributes using the <a href="https://imageattributespro.com/codex/iaffpro_html_image_markup_post_update/?utm_source=wordpress.org&utm_medium=readme" rel="nofollow ugc">iaffpro_html_image_markup_post_update filter</a></li>
</ul>
Other Image Attributes Pro features:
<ul>
<li>Bulk edit image attributes from the Media Library quickly and easily. <a href="https://imageattributespro.com/media-library-bulk-editing/?utm_source=wordpress.org&utm_medium=readme" rel="nofollow ugc">Read more.</a></li>
<li>Bulk Update image attributes from WordPress Media Library. Select images and choose <code>Update image attributes</code> Bulk action in Media Library (list view). <a href="https://imageattributespro.com/bulk-actions/?utm_source=wordpress.org&utm_medium=readme" rel="nofollow ugc">Read more.</a></li>
<li>Bulk Update image attributes from WordPress admin page for Posts, Pages and WooCommerce Products. Select the posts, pages or WooCommerce products in bulk and choose “Update image attributes” Bulk action. <a href="https://imageattributespro.com/bulk-actions/?utm_source=wordpress.org&utm_medium=readme" rel="nofollow ugc">Read more.</a></li>
<li>Copy image attributes to post HTML while updating in Media Library. Any changes made to image attributes in the media library will be automatically synced to the corresponding post HTML. <a href="https://imageattributespro.com/auto-copy-image-attributes-to-post-html-from-media-library/?utm_source=wordpress.org&utm_medium=readme" rel="nofollow ugc">Read more.</a></li>
<li>Update image attributes on post publish or update. Automatically updates image attributes when a post is published or updated. Ensures image attributes are always consistent with settings. <a href="https://imageattributespro.com/update-image-attributes-on-save-post/?utm_source=wordpress.org&utm_medium=readme" rel="nofollow ugc">Read more.</a></li>
</ul>
For screenshots, FAQ and full list of features, please see the <a href="https://imageattributespro.com/?utm_source=wordpress.org&utm_medium=readme" rel="nofollow ugc">product website</a>.
<blockquote>
No Competitors 
 This is the only one that enables you to add missing tags to your images in one go, simple! … This one is very well coded and the author pays great attentions to users feedback / requests / support. 
 – <a href="https://wordpress.org/support/topic/no-competitors/" rel="ugc">arsenalemusica</a>
</blockquote>

Auto Image Attributes From Filename With Bulk Updater (Add Alt Text, Image Title For Image SEO)


the title says it. This plugin will overwrite existing Alt Text values. This is bad if you've already added any Alt Text values yourself in the past, those will be lost and overwritten with the file name... probably with a non human friendly file name.



If they update this later to check for existing values and don't overwrite those then I would recommend giving it another try.



PS: this goes for ALL title, alt text, description, and caption. All of these will be overwritten even if you already have it set to something.


Will overwrite existing Alt Text

Automatically add Image Alt Text, Title, Caption and Description from Filename. Bulk update existing images. Great for Image SEO and Accessibility.

Nix Image Optimizer vs Auto Image Attributes From Filename With Bulk Updater (Add Alt Text, Image Title For Image SEO)