FCP Lightest Lightbox


Simple and super lightweight Lightbox for WordPress with gallery navigation support.


  • Zero render-blocking tags are added on the page
  • Only 0.5 kB is loaded if no linked images found
  • Gallery support
  • Caching, minifying & combining friendly
  • jQuery independent (in case it’s async)
  • Responsive
  • Keyboard navigation
  • Swipe navigation




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.


You can modify the code for your needs, or suggest improvemens on GitHub. It is pretty transparent and well-commented.


  • Desktop view
  • Mobile view


  1. Install the plugin
  2. Activate the plugin


Waiting for your questions, which you can ask here or via GitHub.


March 1, 2024
Here is a positive review to boost your motivation, dear developer ;)It’s the simplest lightbox for images that I use on all my clients’ websites, which are something about 10. Its standout feature is its unobtrusiveness: it doesn’t affect loading speed, doesn’t conflict with caching plugins – it’s as simple as a bolt – robust and effective.However, I would like it to have zoom functionality and the ability to customize its design in some future.
September 8, 2022
For me lightweight means (no jquery) and this plugin checks all the boxes for my requirement. I never wanted a bloated lightbox plugin which adds tons of options and customization features adding un-necessary CSS and JS. Here I just get the lightbox feature with minimal CSS adding no extra bloat to the website. Best part is NO JQEURY and I hope it remains this way. Thanks again!
Read all 2 reviews

Contributors & Developers

“FCP Lightest Lightbox” is open source software. The following people have contributed to this plugin.




  • Swipe navigation added
  • Inlined the inline js
  • Improved the siblings search


  • Removed the render blocking css to be loaded by js
  • Moved the main js and css away to load only if a linked image is found


  • Optimized to fit WP 5.7


  • Optimized: Gallery & image sequences tracking added


  • Initial release