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.
Alternatives to Kas Viewer
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.
Local WebP optimizer for WordPress. Free converts images to WebP; Pro adds AVIF and site-wide image tools.
CTCL Image Galleryv2.3.0
A responsive image gallery block with thumbnail navigation, refined captions, and a fullscreen CTC overlay viewer.
A responsive image lightbox for WordPress galleries, WordPress attachments & FooGallery
Create beautiful galleries from PDFs (and other files), with customizable layouts, lightbox viewer, and drag-and-drop management.
A lightweight Gutenberg Gallery lightbox plugin with fullscreen viewing, next/previous navigation, keyboard controls and responsive design.
A lightweight responsive modal gallery for WordPress powered by Swiper.js with native gallery and keyboard navigation support.
Image Projectorv6.5.3
A unique, low-profile plug-and-play image viewer.
LC Lightbox Litev1.0.0
Give your website a modern image viewer in just one click. Responsive, customizable and free.
Add a full-screen image reader to WordPress posts and pages.