Title: Speed Up – Optimize CSS Delivery Author: Simone Nigro Published: 08 desèmber, 2016 Last modified: 26 yüli, 2026 --- Search plugins ![](https://ps.w.org/speed-up-optimize-css-delivery/assets/banner-772x250.jpg?rev =3623335) ![](https://ps.w.org/speed-up-optimize-css-delivery/assets/icon-128x128.jpg?rev= 3623335) # Speed Up – Optimize CSS Delivery By [Simone Nigro](https://profiles.wordpress.org/nigrosimone/) [Download](https://downloads.wordpress.org/plugin/speed-up-optimize-css-delivery.1.0.14.zip) * [Details](https://pap-cw.wordpress.org/plugins/speed-up-optimize-css-delivery/#description) * [Reviews](https://pap-cw.wordpress.org/plugins/speed-up-optimize-css-delivery/#reviews) * [Installation](https://pap-cw.wordpress.org/plugins/speed-up-optimize-css-delivery/#installation) * [Development](https://pap-cw.wordpress.org/plugins/speed-up-optimize-css-delivery/#developers) [Support](https://wordpress.org/support/plugin/speed-up-optimize-css-delivery/) ## Description **This plugin is no longer recommended.** Deferring every stylesheet makes the page paint before its own layout arrives. That flash of unstyled content is measured as Cumulative Layout Shift — one of the Core Web Vitals this plugin is meant to improve. The current advice is to inline the CSS needed for the top of the page and defer only the rest, which is more than rewriting a `link` tag can do. **If you have not configured the exclusion filter for your main stylesheets, deactivating this plugin will most likely improve your scores rather than worsen them.** This small plugin (5 Kb) loads the stylesheets asynchronously and improve page load times. The recommended use of this plugin is to load your vital stylesheets synchronously and non-vital CSS files asynchronously. Non-vital CSS-files can be for example: fonts, icons, before the fold template-specific CSS, etc. You can choose which files to load synchronously with a filter in your function. php, eg.: ``` // exclude main and child stylesheets from delivery optimization function exclude_from_delivery_optimization($handle){ return in_array($handle, array('main-stylesheet', 'child-stylesheet')); } add_filter('speed-up-optimize-css-delivery', 'exclude_from_delivery_optimization'); ``` Note: this only works if your other plugins and theme add the CSS correctly. ## Installation 1. Upload the complete `speed-up-optimize-css-delivery` folder to the `/wp-content/ plugins/` directory 2. Activate the plugin through the ‘Plugins’ menu in WordPress ## Reviews ![](https://secure.gravatar.com/avatar/652af40b04716a9ea9c1e3d2a068a93c44cdbe5216506ab0af29950bc96e4a6c? s=60&d=retro&r=g) ### 󠀁[5 estrelas. Funciona muito bem.](https://wordpress.org/support/topic/5-estrelas-funciona-muito-bem-4/)󠁿 [Wilson Santana](https://profiles.wordpress.org/oliveira7/) 18 March, 2024 Muito bom. ![](https://secure.gravatar.com/avatar/5cb32e770ccd5a10d4e6bd542ebe83efb2f6db9ca6bcebfc95de76aa57386b44? s=60&d=retro&r=g) ### 󠀁[This plug-in is a blessing](https://wordpress.org/support/topic/this-plug-in-is-a-blessing/)󠁿 [mamadesign](https://profiles.wordpress.org/mamadesign/) 15 yüli, 2022 This plug-in is a blessing This plug-in is the best! We have to give a big prize to the person who created this plug-in. Thank you very much. ![](https://secure.gravatar.com/avatar/382b924c0a1182d84c9641447aaab2bb6630a1b2ab703c3fc44281f2dc810432? s=60&d=retro&r=g) ### 󠀁[Works great!](https://wordpress.org/support/topic/works-great-8188/)󠁿 [castria](https://profiles.wordpress.org/castria/) 25 March, 2022 Does what it says on the tin, which Google pagespeed likes a lot. ![](https://secure.gravatar.com/avatar/c9b5fa373423f356f3c5cca8fed1f56cbd2444fd178cf56961e88d8e961840d9? s=60&d=retro&r=g) ### 󠀁[Beyond amazing.](https://wordpress.org/support/topic/beyond-amazing-3/)󠁿 [erenmenges](https://profiles.wordpress.org/erenmenges/) 24 June, 2020 1 reply THIS PLUGIN IS THE BEST PLUGIN I'VE EVER SEEN IN WORDPRESS. I had page load speeds around 3 to 5 seconds, but after I installed and activated this plugin, it dropped to 1.5 seconds. I was like "Bruh, is this for real? I have been trying to speed up my page for days, and it took only 1 plugin? Woah." I appreciate the work. ![](https://secure.gravatar.com/avatar/a7698edd04a574b4cbb3f4f92073e5cb50abe9d6dd7a0f874c9a62b0a89e5bcb? s=60&d=retro&r=g) ### 󠀁[It Works](https://wordpress.org/support/topic/it-works-1535/)󠁿 [amreshkramar](https://profiles.wordpress.org/amreshkramar/) 30 desèmber, 2018 Works as expected……….. ![](https://secure.gravatar.com/avatar/25e1a73961052a1fc288f15e37f698976e7799196390c0ac1ff54f4314aa1955? s=60&d=retro&r=g) ### 󠀁[Great plugin](https://wordpress.org/support/topic/great-plugin-16670/)󠁿 [betagoo](https://profiles.wordpress.org/betagoo/) 01 February, 2018 This is great plugin! By use this plugin is possible to get green level into Google Page Speed Insight without using any cache plugin. Off course javascripts have to be loaded asynchronously and (or) defer. [ Read all 8 reviews ](https://wordpress.org/support/plugin/speed-up-optimize-css-delivery/reviews/) ## Contributors & Developers “Speed Up – Optimize CSS Delivery” is open source software. The following people have contributed to this plugin. Contributors * [ Simone Nigro ](https://profiles.wordpress.org/nigrosimone/) [Translate “Speed Up – Optimize CSS Delivery” into your language.](https://translate.wordpress.org/projects/wp-plugins/speed-up-optimize-css-delivery) ### Interested in development? [Browse the code](https://plugins.trac.wordpress.org/browser/speed-up-optimize-css-delivery/), check out the [SVN repository](https://plugins.svn.wordpress.org/speed-up-optimize-css-delivery/), or subscribe to the [development log](https://plugins.trac.wordpress.org/log/speed-up-optimize-css-delivery/) by [RSS](https://plugins.trac.wordpress.org/log/speed-up-optimize-css-delivery/?limit=100&mode=stop_on_copy&format=rss). ## Changelog #### 1.0.14 * Deprecated: deferring every stylesheet causes a flash of unstyled content, measured as Cumulative Layout Shift. A dashboard notice explains the trade-off and when deactivating will improve your scores #### 1.0.13 * Fix the media attribute being captured too greedily: an attribute added after it by another filter ended up inside the generated tag * Escape the stylesheet handle and URL before writing them into the tag * Declare minimum requirements: WordPress 6.0 and PHP 7.0 #### 1.0.12 * Tested up to WordPress 7.0 #### 1.0.11 * Tested up to WordPress 6.0 #### 1.0.10 * Tested up to WordPress 5.9 #### 1.0.9 * Tested up to WordPress 5.7 #### 1.0.8 * Tested up to WordPress 5.5 #### 1.0.7 * Tested up to WordPress 5.5 #### 1.0.6 * Tested up to WordPress 5.3 #### 1.0.5 * Tested up to WordPress 5.2 #### 1.0.4 * Fix some css are loaded two time #### 1.0.3 * Update loadCSS #### 1.0.2 * Tested up to WordPress 4.9 * Update loadCSS #### 1.0.1 * Fix bug css not loaded if cached. #### 1.0.0 * Initial release. ## Meta * Version **1.0.14** * Last updated **2 months ago** * Active installations **500+** * WordPress version ** 6.0 or higher ** * Tested up to **7.0.7** * PHP version ** 7.0 or higher ** * Language * [English (US)](https://wordpress.org/plugins/speed-up-optimize-css-delivery/) * Tags * [async css](https://pap-cw.wordpress.org/plugins/tags/async-css/)[defer css](https://pap-cw.wordpress.org/plugins/tags/defer-css/) [Page Speed](https://pap-cw.wordpress.org/plugins/tags/page-speed/)[render blocking css](https://pap-cw.wordpress.org/plugins/tags/render-blocking-css/) * [Advanced View](https://pap-cw.wordpress.org/plugins/speed-up-optimize-css-delivery/advanced/) ## Ratings 5 out of 5 stars. * [ 8 5-star reviews ](https://wordpress.org/support/plugin/speed-up-optimize-css-delivery/reviews/?filter=5) * [ 0 4-star reviews ](https://wordpress.org/support/plugin/speed-up-optimize-css-delivery/reviews/?filter=4) * [ 0 3-star reviews ](https://wordpress.org/support/plugin/speed-up-optimize-css-delivery/reviews/?filter=3) * [ 0 2-star reviews ](https://wordpress.org/support/plugin/speed-up-optimize-css-delivery/reviews/?filter=2) * [ 0 1-star reviews ](https://wordpress.org/support/plugin/speed-up-optimize-css-delivery/reviews/?filter=1) [Your review](https://wordpress.org/support/plugin/speed-up-optimize-css-delivery/reviews/#new-post) [See all reviews](https://wordpress.org/support/plugin/speed-up-optimize-css-delivery/reviews/) ## Contributors * [ Simone Nigro ](https://profiles.wordpress.org/nigrosimone/) ## Support Got something to say? Need help? [View support forum](https://wordpress.org/support/plugin/speed-up-optimize-css-delivery/) ## Donate Would you like to support the advancement of this plugin? [ Donate to this plugin ](http://paypal.me/snwp)