Tsubu

ReformBox extends WordPress Lightbox functionality beyond images. It currently supports Group, Paragraph, and Video blocks with poster images directly, while delegating Image lightbox behavior to WordPress core. For <code>core/image</code>, ReformBox only syncs the sidebar toggle with core lightbox settings.
<a href="https://github.com/tbshiki/reformbox" rel="nofollow ugc">This plugin is developed on GitHub.</a>
Supported Blocks:
<ul>
<li>Image Block – Uses WordPress core lightbox behavior (ReformBox panel toggles core <code>lightbox.enabled</code>)</li>
<li>Video Block – Opens in a lightbox when a poster image is set (poster acts as the click trigger)</li>
<li>Group Block – Supports both <code>same</code> mode (same content in page + modal) and <code>split</code> mode (separate Preview/Modal direct child Group slots)</li>
<li>Paragraph Block – Click to open itself in a lightbox</li>
</ul>
Features:
<ul>
<li>No-code lightbox creation via block editor controls</li>
<li>Core-first image lightbox integration (<code>core/image</code>)</li>
<li>Core-aligned overlay markup for custom lightboxes</li>
<li>Core-aligned zoom animation</li>
<li>ESC key and overlay click to close</li>
<li>Accessible (ARIA attributes, focus management, keyboard navigation)</li>
<li>Group split mode with Preview/Modal slot mapping</li>
<li>Safe split fallback: if no Modal slot is assigned, Preview content is used</li>
<li>Lazy-loaded assets (CSS/JS only loaded when needed)</li>
<li>Self-lightbox videos defer preload/autoplay until opened</li>
<li>Core image workflow integration without overriding core image rendering</li>
<li>Global overlay background color and opacity controls in Settings > ReformBox</li>
<li>Plugin list row includes a Settings action link for quick access</li>
<li>Lightweight and performant</li>
</ul>

ReformBox

Universal Lightbox for WordPress – lightbox support for Group, Paragraph, Video blocks with poster images, and core Image workflows.

Piyush Asthana

Asap – Popups Studio lets you create and manage multiple popups from the WordPress admin. Each popup has its own settings for when and where it appears.
Features:
<ul>
<li>Multiple popups – Create as many popups as you need; each is a separate post with its own content and settings.</li>
<li>Display control – Enable/disable per popup; choose trigger (page load with delay, scroll percentage, or exit intent).</li>
<li>Visibility – Show on all pages, pages only, posts only, or selected pages.</li>
<li>Show once – Limit to once per session, per day, per week, or per month using cookies.</li>
<li>Custom HTML – Optional custom HTML (replacing the main editor content) with allowed tags only; no script insertion.</li>
<li>Animations – None, fade in, or slide up.</li>
<li>Width – Set popup width in pixels or percentage.</li>
<li>Quick toggle – Enable/disable popups from the list screen with a toggle switch.</li>
</ul>
For site-wide or per-page custom CSS, use the WordPress Customizer or theme/block editor. Uses the block editor (or classic editor) for popup content; optional custom HTML overrides that for a single popup. All user-facing strings are translation-ready (text domain: <code>asap-popups-studio</code>).

Asap – Popups Studio

Create and manage multiple custom popups with individual settings and display rules.

ReformBox vs Asap – Popups Studio