f13dev

Each image within a post or page will become a clickable link with a popup lightbox. This does not use an off the shelf lightbox, instead a custom made 6KB jQuery lightbox helping to reduce overhead on your site without compormising features.
This lightbox is fully acessible via keyboard only input, meets and exceeds WCAG AA contrast requirements, includes keypress navigation (arrow keys to navigate between images and escape to close).
No configuration is required to enable the Lightbox once installed and activated on your WordPress site. Should you wish to exclude an image from the lightbox, simply add the class “no-lightbox” to the image.
<a href="https://f13.dev/wordpress-plugin-lightbox/" rel="nofollow ugc">Read more about F13 Lightbox</a>
[https://f13.dev/wp-content/uploads/2021/10/f13-lightbox-example.png Example of F13 Lightbox]

F13 Lightbox

Add a lightbox for any image within a post or page, includes accessibility features.

stevegibbs

Gallery Helper is a lightweight and unobtrusive lightbox/slideshow add-on to WordPress’s image gallery block.
<h3>Usage</h3>
<ul>
<li>Add a gallery block to your page, post or cpt like usual.</li>
<li>Check “Enable Lightbox”” in the gallery block settings.</li>
<li>Optional: choose automatic slide advancing.</li>
<li>That’s it</li>
</ul>

Steve's Gallery Helper

Gallery Helper is a lightweight and unobtrusive lightbox/slideshow add-on to Wordpress's image gallery block.

F13 Lightbox vs Steve's Gallery Helper