Local WebP optimizer for WordPress. Free converts images to WebP; Pro adds AVIF and site-wide image tools.
Alternatives to Slimbox Plugin
Plugins below are selected for functional relevance and current directory signals. Active-install counts do not affect this ranking.
Relevant replacements
WordPress plugins with similar use cases
Compatibility and update metadata provide context, not a quality guarantee. Review each plugin’s details for your site.
CTCL Image Galleryv2.3.0
A responsive image gallery block with thumbnail navigation, refined captions, and a fullscreen CTC overlay viewer.
Five Number Lightboxv1.3.1
A small image lightbox with no jQuery and no dependencies. Works on old posts and new ones without editing any content.
A lightweight masonry image gallery with a full-screen lightbox, as an Elementor widget and a shortcode.
A powerful and customizable gallery block for WordPress.
FancyBox for WordPressv3.4.2
Seamlessly integrates FancyBox lightbox into your WordPress blog: Upload, activate, and you're done. Additional configuration optional.
Create responsive WordPress image galleries with per-image captions, typography controls, hover effects, and an optional lightbox.
WF Magnific Lightboxv0.9.14
WF Magnific Lightbox allows the user to view larger versions of images and galleries in a speed optimized and full-responsive lightbox (overlay).
Image Zoom on Hoverv1.0.3
Transform your WordPress images with elegant zoom functionality. Click any image to view it in a beautiful full-screen overlay with smooth animations.
Firelight Lightboxv2.3.25
Formerly Easy Fancybox. The most popular WordPress lightbox plugin. Simple, fast, and responsive. Opens images, videos, PDFs, and custom popups.