Core Web Vitals & PageSpeed Booster


Core Web Vitals (CWV) is the new ranking factor

Google announced that “Core Web Vitals” are going to be a significant ranking signal for websites. In fact, Core Web Vitals or the page experience signal is going to become a requirement for a page to appear in Google’s Top Stories.


  • Flush Cache: Using this option you can choose on which events ( WordPress Update,Switching Theme,Post/Page Deletion ) you want to clear website cache.
  • Auto Clear Cache: Clear you website on regular intervals , this helps you to keep your website cache updated.
  • Webp images: If images are slowing down your website, then converting them to WebP format can improve your page load speed test scores.
  • Lazy Load: Lazy loading allows your website to only load images when a user scrolls down to a specific image, which reduces website load time and improves website performance.
  • Minification: If you are trying to achieve 100/100 score on Google Pagespeed or GTMetrix tool, then minifying CSS and JavaScript will significantly improve your score.
  • Remove Unused CSS:Unused CSS is any CSS code added by your WordPress theme or plugins that you don’t really need. Removing this CSS code improves WordPress performance and user experience.
  • Google Fonts Optimizations: You may start noticing external resources like fonts affecting Google PageSpeed + load times. This is where loading Google Fonts locally comes into play.
  • Delay JavaScript Execution:You can delay JavaScript based on user interaction. This can be a great way to speed up the paint of the page for Google PageSpeed when something isn’t needed right away. Especially heavy third-party scripts like Google Adsense, Google Analytics etc.
  • Cache: Caching is one of the most important and easiest ways to speed up WordPress! it reduces the amount of work required to generate a page view. As a result, your web pages load much faster, directly from cache.


We try our best to provide support on forums. However, We have a special team support where you can ask us questions and get help. Delivering a good user experience means a lot to us and so we try our best to reply each and every question that gets asked.

Bug Reports

Bug reports for Core Web Vitals & PageSpeed Booster are welcomed on GitHub. Please note GitHub is not a support forum, and issues that aren’t properly qualified as bugs will be closed.


  • PHP CSS Parser library used – License URI: (PHP-CSS-Parser is freely distributable under the terms of an MIT-style license.)
  • CSS from HTML extractor library used – License URI: (CSS from HTML extractor is freely distributable under the terms of an MIT-style license.)
  • WebP Convert library used – License URI: (WebP Convert is freely distributable under the terms of an MIT-style license.)



9 чэрвеня, 2024 1 reply
I don’t normally leave reviews but this thing trashed the site. Pictures, margins, menus, everything. Uninstalling didn’t fix it. I had to restore from backup. You will regret it if you install this.
17 лютага, 2024 1 reply
The plugin works fine alright. Bulk-changes all images to webp which is a valuable feature.But unfortunatedly it breaks spelling in german as it replaces all “Umlaut” with gremlins (¢#^¶)
9 лютага, 2024 1 reply
Hello Magazine 3 team, I tried this plugin on my website which uses a theme named Vehica this week. The result on Google Page speed Insights was good and my mobile score matched my desktop score at 99% so top marks. However my mobile menu was no longer useable and there is no way the drop down would work. I am using WP Rocket and Cloudflare also. I disabled both of these plugins and cleared my cache and browser and still the same problem. I then turned of the cache, disabled all CSS features in your plugin and no change. My mobile menu still did ot work. Finally a deleted your plugin and the menu was active once again. I would love for your plugin to work for me and I would also even pay a small yearly fee if it did but at the moment its not good enough. Sad
11 студзеня, 2024 1 reply
This plugin caused significant issues with my blog posts that were previously performing well in Google search rankings, resulting in a noticeable drop. I am extremely dissatisfied with the outcome.
4 снежня, 2023 1 reply
After I installed the plugin, I am unable to upload new images. This is the error I get: The server cannot process the image. This can happen if the server is busy or does not have enough resources to complete the task. Uploading a smaller image may help. Suggested maximum size is 2560 pixels. I tried to switch the Image Optimization to Manual. It does not help either.
Read all 14 reviews

Contributors & Developers

“Core Web Vitals & PageSpeed Booster” is open source software. The following people have contributed to this plugin.



1.0.19 (07 May 2024)

  • Fixed: Cant over ride the width of .cwvpsb_iframe due to the important property used #132
  • Fixed: Compatibility with PHP 8.3 version #140
  • Test: Test with new version of wordpress i.e. 6.5v #139
  • Fixed: PHP Warning: Undefined variable $img_srcset #141
  • Improvement : Option to exclude lazyloading #91

1.0.18 (27 February 2024)

  • Fixed: CSS break after latest update (1.0.17) #130
  • Fixed: Displaying unknown characters #133
  • Improvement: Improvement in Image lazy load #131
  • Improvement: Image optimization not working if html contain invalid DOM #134

1.0.17 (19 January 2024)

  • Fixed: The type attribute is unnecessary for JavaScript resources. #123
  • Fixed: Element script must not have attribute defer unless attribute src is also specified. #122
  • Added: Option where we can set different delay JS methods on mobile and desktop. #119
  • Added: Option for flush cache on a predefined schedule. #120
  • Added: Option to keep cache for a long period of time. #121
  • Improvement: Automatic Resizing to fix Properly Size Image issue. #118
  • Fixed: Network deactivate is not working #126
  • Improvement: Code Improvement #125
  • Improvement: Bulk convert to webP #127

1.0.16 (15 November 2023)

  • Fixed: Robots.txt error appears when you we enable our CWV plugin. #114
  • Fixed: wp-content/gravatars folder not removed upon uninstall #112
  • Fixed: Uninstall.php only removes main critical URLs table from database in multisite #111
  • Improvement: Updated settings link #113
  • Compatibility: Checked compatibility with wordpress v6.4 #115

1.0.15 (22 September 2023)

  • Added: Compatibility with MYSQL v5.5 #97
  • Fixed: Fatal Error on Multisite Activation: is_plugin_active_for_network() Undefined #106
  • Fixed: Youtube embed video Not showing in AMP #105
  • Improvement: Cache is off but still in header it’s showing clear cache #104

1.0.14 (17 August 2023)

  • Fixed: Parse error unexpected ‘)’ #87
  • Fixed: Error in core-web-vitals-pagespeed-booster Plugin. #99
  • Fixed: Compatibility with 10Web Booster #96
  • Improvement: Added newsletter form #4
  • Improvement: WordPress 6.3 compatibility check #100
  • Improvement: Improved and optimized the code according to WP standards #101

1.0.13 (03 June 2023)

  • Improvement: Improved CSS load
  • Fixed: Redirection Issue

1.0.12 (14 April 2023)

  • Fixed: TypeError jQuery is not a function on console #84
  • Fixed: Google fonts not loading on PHP 8.0+ #83
  • Fixed: Conflict with the Google reCAPTCHA v3 #82
  • Fixed: Warning Undefined array key “advance_support” #80
  • Improvement : Add a label to the Exclude URL box #81
  • Improvement : Exclude Google analytics from js delay #62

1.0.11 (17 February 2023)

  • Fixed: Woocommerce payment page is not working. #77
  • Improvement : Remove plugin dependency from file_get_contents function #78

1.0.10 (02 February 2023)

  • Improvement: Optimized code and fixed frontend js issue

Full changelog available at changelog.txt