Responsive Lightbox by dFactory

Gratis, werkt eenvoudig en netjes;
NB: wb snelheid: bij de instellingen onderaan kan je een vinkje zetten naast:
Enable to load scripts and styles only on pages that have images or galleries in post content.

https://wordpress.org/support/plugin/responsive-lightbox

• Select from 6 responsive lightbox scripts (SwipeBox, prettyPhoto, FancyBox, Nivo Lightbox, Image Lightbox, Tos “R” Us)
• Automatically add lightbox to WordPress image galleries
• Automatically add lightbox to WordPress image links
• Automatically add lightbox to WordPress video links (YouTube, Vimeo)
• WooCommerce product gallery support
• Option to display single post images as a gallery
• Option to modify native WP gallery links image size
• Option to set gallery images title from image title, caption, alt or description
• Option to force lightbox for custom WP gallery replacements like Jetpack tiled galleries
• Option to trigger lightbox on custom jquery events
• Option to conditionally load scripts and styles only on pages that have images or galleries in post content
• Enter a selector for lightbox
• Highly customizable settings for each of the lightbox scripts
• Multisite ondersteuning
• Filter hook for embeddding different scripts based on any custom conditions (page, post, category, user id, etc.)
• .pot file for translations included