Lazy Load by WP Rocket


Lazy Load displays images and/or iframes on a page only when they are visible to the user. This reduces the number of HTTP requests mechanism and improves the loading time.

This plugin works on thumbnails, all images in a post content or in a widget text, avatars, smilies and iFrames. No JavaScript library such as jQuery is used and the script weight is less than 10KB.

Related Plugins

  • Imagify: Best Image Optimizer to speed up your website with lighter images.
  • WP Rocket: Best caching plugin to speed-up your WordPress website.


  1. Upload the complete rocket-lazy-load folder to the /wp-content/plugins/ directory
  2. Activate the plugin through the ‘Plugins’ menu in WordPress


Installation Instructions
  1. Upload the complete rocket-lazy-load folder to the /wp-content/plugins/ directory
  2. Activate the plugin through the ‘Plugins’ menu in WordPress
How can i deactivate Lazy Load on some pages?

You can use the do_rocket_lazyload filter.

Here is an example to put in functions.php files that disable lazyload on posts:

add_action( 'wp', 'deactivate_rocket_lazyload_on_single' );
function deactivate_rocket_lazyload_on_single() {
    if ( is_single() ) {
        add_filter( 'do_rocket_lazyload', '__return_false' );
How can i deactivate Lazy Load on some images?

Simply add a data-no-lazy="1" property in you img or iframe tag.

You can also use the filters rocket_lazyload_excluded_attributes or rocket_lazyload_excluded_src to exclude specific patterns.

I use plugin X and my images don’t show anymore

Some plugins are not compatible without lazy loading. Please open a support thread, and we will see how we can solve the issue by excluding lazy loading for this plugin.



CSS property background-image is not supported. Horizontal carousel images are not supported.

From “Oh My!” to “Oh No!”

I apparently spoke too soon. As it turns out the performance boost I thought was the result of this plugin seems to have been from uninstalling another plugin which presumably allowed WP Super Cache to work more efficiently. This plugin was, as it turns out, not even “turned on” yet. I assumed it was “on” by default originally. once I turned it on, however, it did the same thing that the previous two plugins (mentioned below) did to a couple of parallax images on the site. Like the previous 2 lazy load plugins, when I deactivated it, the images were corrected and page stopped stuttering as I scrolled down the page. Therefore, I have to change my previous 5 star rating to a more realistic 1 star since the plugin did more harm than good.

Original Review:
I don’t know what this plugin does that’s different from similar plugins, but I tried a couple, skipped over a number of others (which hadn’t been updated in a long time) and finally tried this one (almost ready to give up on the whole concept of a lazy page loader). The couple I tried not only didn’t seem to do anything to speed up my site, but goofed up some images/graphics on my site. Once I tried this one (Rocket Lazy Load), however, my site not only worked correctly but, as a one page parallax, it actually (finally) got pretty peppy! I also have WP Super Cache installed which didn’t seem to do much either. Again, I have no idea what makes this work, but on my site anyway (which is still being developed), it works and has made a huge difference. I was beginning to give up hope on having a quick site, but this has given me reason to hope that by the time I get the site completed, it may actually be user-friendly…we’ll see how it goes as I move forward.

Read all 30 reviews

Contributors & Developers

“Lazy Load by WP Rocket” is open source software. The following people have contributed to this plugin.




  • 2017-09-16
  • Prevent scripts and styles being removed during html parsing


  • 2017-09-12
  • Fix images not displaying in certain conditions because image attributes exclusion was not working correctly


  • 2017-09-07
  • Don’t apply lazyload on Divi slider


  • 2017-09-01
  • Improve HTML parsing of images and iframes to be faster and more efficient
  • Make the lazyload compatible with fitVids for iframes
  • Don’t apply lazyload on AMP pages (compatible with AMP plugin from Automattic)
  • Use about:blank as default iframe placeholder to prevent warning in browser console
  • Don’t apply lazyload on upPrev thumbnail


  • 2017-08-22
  • Fix missing lazyload script
  • Don’t lazyload for images in REST API requests


  • 2017-08-22
  • Update lazyload script to latest version
  • Change the way the script is loaded


  • 2017-02-13
  • Bug fix: Remove use of short tag to prevent 500 error on some installations


  • 2017-02-12
  • New
    • JS library updated
    • Support for iFrame
    • Support for srcset and sizes
    • New options page


  • 2015-04-28
  • Bug Fix: Resolved a conflict between LazyLoad & Emoji since WordPress 4.2


  • 2015-01-08
  • Bug Fix: Don’t apply LazyLoad on captcha from Really Simple CAPTCHA to prevent conflicts.


  • 2014-12-28
  • Improvement: Add « rocket_lazyload_html » filter to manage the output that will be printed.

  • 2014-07-25
  • Fix stupid error with new regex in 1.0.1


  • 2014-07-16
  • Bug Fix: when a IMG tag or content (widget or post) contains the string “data-no-lazy”, all IMG tags were ignored instead of one.
  • Security fix: The preg_replace() could lead to a XSS vuln, thanks to Alexander Concha
  • Code compliance


  • 2014-01-01
  • Initial release.