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.

Pruthak Patel

RS WebStudios

Deepak Lakhara

Image Alt Text


This is the best plugin to work with image alt text for SEO purposes. Your plugin is very useful, thank you for building it.


Great Plugin!


The simplest way to add and update alt text without refreshing the page and gives the best way to add all missing alt text in one click by image name. Good Job 


Helpfull


This plugin is amazing. So simple, so easy, sooooooo gooooood for you SEOOooooooo. So why aren't you doing it yet? Just get the plugin, and when you have 5 minutes, go make your site better than the other guy's.



Come on- when you put on shoes, do you tie them?



Of course you do.



Now go put some ALT tags with keywords on your images so you don't look like a mess.


ALT TAGS LIKE THE BIG DOGS. Let's go. SEO YOUR SITE.

Add, edit, and bulk-generate alt text for every WordPress image — manually or automatically using AI. Fix image SEO and accessibility in minutes.

Nix Image Optimizer vs Image Alt Text