FirmCatalyst

<p>Simple and super lightweight Lightbox for WordPress with gallery navigation support.</p>
<h4>Features</h4>
<ul>
<li>Zero render-blocking tags are added on the page</li>
<li>Only 0.5 kB is loaded if no linked images found</li>
<li>Gallery support</li>
<li>Caching, minifying & combining friendly</li>
<li>jQuery independent (in case it’s async)</li>
<li>Responsive</li>
<li>Keyboard navigation</li>
<li>Swipe navigation</li>
</ul>
<h4>Demo</h4>
<p><a href="https://firmcatalyst.com/lightest-lightbox/" rel="nofollow ugc">firmcatalyst.com/lightest-lightbox</a></p>
<h4>Usage</h4>
<p>Starts working just by the plugin activation. Opens linked images in a popup Lightbox by click. Adds arrow navigation, if an image is a part of a gallery or other links sequence.</p>
<h3>Development</h3>
<p>You can modify the code for your needs, or suggest improvemens on <a href="https://github.com/VVolkov833/fcp-lightbox" rel="nofollow ugc">GitHub</a>. It is pretty transparent and well-commented.</p>


FCP Lightest Lightbox

radogado

<p>Rado’s Native Lightbox instantly upgrades every WordPress gallery into a beautiful, full-screen lightbox carousel. Just activate and go — your existing galleries are transformed automatically, no shortcodes to learn, no settings pages to configure.</p>
<p>Built on <a href="https://nativecarousel.com/" rel="nofollow ugc">Native Carousel</a>, it uses the browser’s own scroll-snapping instead of heavy animation libraries. The result is buttery-smooth swiping on phones, fluid keyboard navigation on desktops, and a total footprint of roughly 13 KB — smaller than a single thumbnail image.</p>
<p><strong>Why this plugin?</strong></p>
<ul>
<li><strong>Zero configuration</strong> — activate it and every gallery on your site becomes a lightbox carousel. Deactivate it and galleries revert to normal. Nothing is written to your database.</li>
<li><strong>Truly lightweight</strong> — ~13 KB total (JS + CSS). No jQuery, no frameworks, no external requests. Your PageSpeed score stays intact.</li>
<li><strong>Works with any theme</strong> — Twenty Twenty-Five, Astra, GeneratePress, or anything else. The plugin bundles everything it needs.</li>
<li><strong>Accessible by default</strong> — full keyboard navigation, focus trapping in the lightbox, screen-reader labels on every control, and <code>prefers-reduced-motion</code> support.</li>
<li><strong>Native scroll-snap</strong> — hardware-accelerated, 60 fps swiping powered by the browser itself, not JavaScript animation loops.</li>
<li><strong>Dark mode aware</strong> — the lightbox overlay adapts to the visitor’s system color scheme automatically.</li>
</ul>
<p><strong>Features at a glance:</strong></p>
<ul>
<li>Full-screen lightbox with swipe, keyboard and mouse-wheel navigation</li>
<li>Compact thumbnail index strip with scrollable overflow</li>
<li>“Thumbnails only” toggle in both the Block Editor sidebar and Classic Editor settings</li>
<li>Endless (infinite loop) navigation</li>
<li>Lazy-loaded images with low-resolution placeholder blur while loading</li>
<li>Captions and alt text fully preserved</li>
<li>Featured-image click opens the matching gallery slide on single posts</li>
<li>Editor performance guard — caps image sizes in the block editor to prevent crashes with large galleries</li>
</ul>
<p><strong>How it works:</strong></p>
<p>The plugin intercepts gallery rendering at display time and outputs <a href="https://nativecarousel.com/" rel="nofollow ugc">Native Carousel</a> HTML markup. Your post content is never modified — the transformation is purely visual and fully reversible.</p>
<h3>Third-party source code</h3>
<p>This plugin bundles minified assets from <strong>Native Carousel</strong>, an open-source carousel component (GPL-2.0-or-later).</p>
<ul>
<li>Homepage & documentation: <a href="https://nativecarousel.com/" rel="nofollow ugc">https://nativecarousel.com/</a></li>
<li>Source code repository: <a href="https://github.com/radogado/n-carousel" rel="nofollow ugc">https://github.com/radogado/n-carousel</a></li>
</ul>
<p>The following files in <code>assets/</code> are the minified production builds:</p>
<ul>
<li><code>n-carousel.min.js</code> — carousel runtime</li>
<li><code>n-carousel-preload.min.js</code> — image preloader</li>
<li><code>n-carousel.min.css</code> — carousel styles</li>
</ul>
<p>The unminified, human-readable source is available in the GitHub repository linked above. No build tools are needed to work with this plugin’s own code — <code>gallery-lightbox.css</code> and the admin JavaScript files are shipped unminified and readable.</p>
<p>This plugin is also maintained as part of the niui theme project:<br />
<a href="https://gitlab.com/spacest/niui/-/tree/main/rados-native-lightbox" rel="nofollow ugc">https://gitlab.com/spacest/niui/-/tree/main/rados-native-lightbox</a></p>


Rado's Native Lightbox

Transforms WordPress galleries into lightweight lightbox carousels. Works with any theme — only ~13 KB.

FCP Lightest Lightbox vs Rado's Native Lightbox