WP Speed of Light


WordPress does not have a system for speed optimization by default. That’s why you need a powerful plugin that speed up WordPress with technical and advanced features, yet accessible to everyone.
WP Speed of Light starts with a cache and Gzip compression, plus, you got a file minification and group tools, a database cleanup system, a htaccess optimization, an auto cache cleaner and a full CDN integration.

When it comes to performance loading time, it requires some test to identify witch plugin, theme, page may require more attention.
WP Speed of Light also includes a speed loading test and compare, and a database queries test. To go one step beyond with your WordPress speed, a PRO ADDON upgrade (optional) with custom support is available.

More information and feature details here!

Still not sure! test the plugin live on addendio sandbox demo website

Video demo:

WP Speed of Light; speed optimization features:

  • Generate static cache
  • Selective or global cache for Desktop, Tablet and Mobile
  • Check Gzip compression
  • Remove Query strings: better score on Pingdom, Gtmetrix, Google Page Speed…
  • Browser cache: Expire headers optimization
  • Minify resources: HTML, CSS, JS
  • Add Expire Headers (browser cache)
  • Database optimization, clean: post revision, auto draft content, trashed content, spam comments, trackbacks and pingbacks, transients options
  • CDN integration: load any CDN content
  • Automatic clean cache on interval and cache cleaner button
  • Automatic clean cache on content saving
  • Option to disable the WordPress REST API
  • Option to disable the WordPress RSS feeds
  • Cache external resources such as scripts served from Google (served locally)
  • WooCommerce dedicated integration
  • WordPress multisite compatible
  • Page builders compatibility: ACF, DIVI Builder, Beaver Builder, Site Origine, Themify builder, Live Composer, Elementor…
  • Developer friendly using Hooks and Filters

Features included in WP Speed of Light PRO ADDON
* Image compression
* Image lazy loading with page exclusion
* Local Font and Google Font Group
* Visual File Exclusion from Group & Minification
* Cache Pre-Loading
* DNS Prefetching
* Cleaup CDN data: Cloudflare, KeyCDN, MaxCDN, Varnish, Siteground cache
* Database Automatic Cleanup
* Possibility to disable Emojis
* Possibility to remove Gravatar
* Possibility to load scripts in footer
* Disable Cache per WordPress User Role
* Page Caching Exclusion Using PHP Rules
* Custom support for configuration

WP Speed of Light speed testing:

  • Page loading time, first load
  • Page loading time, second load
  • First byte time
  • Time to start rendering
  • Element served from cache in %
  • Elements compressed with Gzip in %
  • Percent on compressed images
  • Run up to 200 pages speed test per day (by WebPageTest.org)

Give a comfortable navigation experience to your users and get a better search engine rank!

Main plugins from JoomUnited:


Before leaving a review >> Feel free to ask questions here in the support section, we reply to every question!
A dedicated private ticket support is also available on the website.


PHP 5.3+, PHP 7.x recommended for better performance, WordPress 4.5+

Thanks to

We would like to thank you the developers of the following plugins that have inspired us with their code

  • Autoptimize
  • Query monitor plugin


  • Main dashboard of the plugin with speed optimization check
  • Generate static cache, Gzip compression check, minification, browser cache
  • Test the speed of your WordPress pages to identify performance issues
  • Test the database queries to identify performance issues
  • Simple optimization settings, optimize in no time
  • Automatic and manual cache cleaner
  • Visual file incusion/exclusion from file group and minify


To install the automatically:

  • Through WordPress admin, use the menu: Plugin > Add new
  • Search for WP Speed of Light
  • Click on install then click activate link

To install the plugin manually:

  • Download and unzip the plugin wp-speed-of-light.zip
  • Upload the /wp-speed-of-light directory to /wp-content/plugins/
  • Activate the plugin through the ‚Plugins‘ menu in WordPress
  • Use the WP Speed of Light left menu

Once the plugin is installed, open the admin left menu menu.


Is WP Speed of Light 3rd party compatible?

It is, of course we can’t test with all dynamic element yet you have some options to exclude some specific URL from optimization. Feel free to send us compatibility request on our pre-sale forum or on the plugin directory support forum.

Is WP Speed of Light free?

Yes totally free of charge, fell free to install, update and even ask us questions on the WordPress plugin directory forum. We offer an optional free upgrade.

Is WP Speed of Light translated into other languages than english?

Yes, we use a translation tool accessible from the plugin setting where you can: get languages, translate, share translation with us (and get a gift for that)

Is WP Speed of Light compatible with WooCommerce?

Yes, we have added some specific code to remove specific dynamic data from cache.

How can I activate 100% of the optimization features?

In the plugin we’ve made a distinction between casual optimization like caching, Gzip compression, headers expire, query strings and advanced optimization like file group and minify.
You can activate all optimizations but, depending of your website, number and complexity of your plugins, that you remove some files or pages from this optimization to avoid problems.
All website cannot be 100% optimized even the big websites on the market like amazon.com

How can I get 100% on pagespeed test?

Some of the Google pagespeed recommendations require that you modify your plugin code, at least how the script are called, to defer some script loading for example.
At Google they’re actually smart enough not to consider a score based on criteria you can’t apply on all website BUT on loading time (reffer to the Google Search Console)
Our recommendation here:
1. Focus only on loading time, not on your score
2. Use webpagetest.org instead
3. All the tools are available to get a 100% page speed score in the plugin

Is WP Speed of Light compatible with any CDN? (Cloudflare, KeyCDN, MaxCDN)

Yes because the CDN resource call use URLs along with content inclusion and exclusion options only, so you can use any CDN service.

Is WP Speed of Light compatible with Varnish cache

Yes, there’s a specific integration in the optional pro addon, that offer the automatic Varnish cache cleaup on content save and manual cleaup.

Is WP Speed of Light compatible with Siteground SuperCacher cache

Yes, there’s a specific integration in the optional pro addon, that offer the automatic Siteground SuperCacher cache cleaup on content save and manual cleaup.

What is the image lazy loading?

Lazy Load delays loading of images in long web pages. Images outside of viewport will not be loaded before user scrolls to them. This is super efficient on pages with a large amount of images.
You also have have an option to exclude URL from lazy loading.

Can I make a custom integration with another plugin?

Sure, WP Speed of Light is developer friendly and contains several Hooks and Filters detailled here:


Quick optimization

WP Speed of Light is my goto plugin when I want to optimize websites in no time. I use a safe configuration that does not require any testing on each WordPress update using cache, compression, HTML minification, remove RSS feeds and so on.

For beginners yes -for advanced not.

Poorly controlled. Sometimes gets display error. Does not connect stabin with CDN server. If you are uncomfortable with compression and want to make your site faster then yes. I invested in the premium. not a good investment

time saving

Activated and configured in 10 minutes, then I got a "A" grade score on webpagetest (except for the CDN because I don't need it yet but it can be configured in this plugin). It saves me the install of 4 plugins to optimize my website: time and performance saving.

I love this plugin!

I think it's brilliant! Better then all the other caching and optimizing plugins like W3 Total Cache and so on. Two thumbs up!!

Thanks a lot

Thanks a lot. This is really good at cleaning my browsing history. It is a freeware system optimization, privacy and cleaning tools.. I wish it will helpful to all..

Amazingly simple and it WORKS!

I've been struggling with another plugin that promises to do what Speed of Light actually does. The other plugin is from a major premium subscription service but their design was confusing and it crashes when I try to make any changes to my site. (No names but everything is a super hero.) I got tired of disabling it to make a change and then running through their minification process every time I turned it back on. I read a positive review of Light Speed plugin on wplift.com and gave it a try. The setup was unbelievably simple and my site got a 100% right out of the gate on GTMetrix.com on the first score and an 85% on the 2nd which is higher than I had before. I can also make minor changes and leave this plugin on which is A-W-E-S-O-M-E!
Lies alle 38 Rezensionen

Mitwirkende & Entwickler

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  • Fix : Warning PHP in front end when using exclude
  • Fix : Fix style for safari browser
  • Add : WordPress 5.0 compatibility


  • Fix : Setting dropdown menu in Firefox
  • Fix : Speed Analysis with invalid API Key now return a proper error message


  • Fix : Installer error


  • Add : New UX for Speed Otimization and Speed Testing
  • Add : Possibility to search in plugin menus and settings
  • Add : New plugin installer with quick configuration
  • Add : Environment checker on install (PHP Version, PHP Extensions, Apache Modules)
  • Add : System Check menu to notify of server configuration problems after install
  • Add : Server testing before plugin activation to avoid all fatal errors


  • Add : Add actions and filters for developers


  • Fix : Sharing translations


  • Add : Import/Export plugin configuration
  • Add : Exclude URLs from the lazy loading


  • Add : Enhance code readability and performance with phpcs


  • Fix : Fix active cache system and expire headers option


  • Add : Integrate UX with WP Speed of Light Addon 2.1 features


  • Add : Option to disable the WordPress REST API
  • Add : Option to disable the WordPress RSS feeds
  • Add : Cache external resources such as scripts served from Google (served locally)


  • Fix : Files starting by // opened locally
  • Fix : Lower class name stdClass


  • Fix : Remove query string issue
  • Fix : Php warning when translation was modified


  • Fix : Using PHPCS to make standard definitions
  • Fix : Change preload cache activation method


  • Add : Change install message to a WP option, and display only once
  • Add : Compatiable with the PRO ADDON CDN cache cleanup


  • Add : Add a warning lightbox when the user activate the minification
  • Add : Add a left menu “More SpeedUp


  • Add : CDN integration: define CND URL and content
  • Add : CDN integration: define CND content exclusion
  • Add : CDN integration: force CDN relative or absolute path
  • Fix : Generate a different cache for http and https (if no redirect is made)


  • Add : Compatiable with the PRO ADDON plugin
  • Add : Move some configuration options to the speed optimization tab
  • Add : Allow exclusion with rules like www.domain.com/blog*
  • Add : Add time parameter for clean each
  • Fix : Fix a non well formed numeric value encountered with php 7.1


  • Add : Remove the Gzip feature by default and check server GZip activation
  • Add : GZip check on the dashboard and display a specific message when it’s not detected
  • Add : File grouping and file minification can now be activate separately


  • Fix : Vulnerability in placeholders
  • Fix : PHP error when htaccess is not writable
  • Fix : Remove query strings on WooCommerce


  • Add : Option remove Query Strings from static resources


  • Fix : Fix error cache when plugin directory changed
  • Fix : Fix show install message after reloading page


  • Fix : Store default settings on plugin activation
  • Fix : PHP error when minify HTML checked


  • Fix : Conflict with other plugins that used mobile detect script
  • Fix : Warning PHP when installed plugin on Addendio


  • Add : Dashboard: Add the PHP version check and File Group activation
  • Add : Option to serve cache for desktop, tablet and mobile: Global, Specific or No cache
  • Add : Detect mobile plugin theme provider and disable cache automatically (WPtouch…)


  • Add : Page builders compatibility : ACF, DIVI Builder, Beaver Builder, Site Origine, Themify builder, Live Composer, Elementor page builder
  • Add : Update the settings with On/Off button instead of checkbox
  • Add : Activate by default the clean cache button in the toolbar
  • Add : Change presentation text for ImageRecycle integration


  • Fix : Enhance PHP 5.2 plugin deactivation


  • Add : Add builtin translation tool


  • Fix : Support for russian language in URL exclusion tool
  • Fix : Check Gzip request


  • Fix : Read data from another server
  • Fix : Disable cache for admin user
  • Add : Replace Curl by wp_remote_get to get data


  • Fix : Add multisite compatibility: minify JS and CSS on multisite


  • Fix : Remove header expiration code in .htaccess when plugin is disabled


  • Add : Option to group js and css (after minification)


  • Add : WooCommerce dedicated integration
  • Add : Image compression ImageRecycle integration
  • Add : Clean cache on plugin settings save
  • Fix : Security, use wp_nonce in admin forms


  • Fix : PHP7 warning Missing argument
  • Fix : Add blank line to wp-config.php when activate and deactivate plugin
  • Fix : Remove everything from wp-config.php on uninstall
  • Fix : Cache activation message on first activation only
  • Fix : Gzip cache not activated on some servers


  • Add : Display clean cache button in frontend toolbar
  • Fix : Cache and purge cache on comments
  • Fix : Analysis cache size


  • Fix : White screen in first install


  • Add : Initial release