Free WordPress optimization plugins that actually work!

After developing the whole website we often come across a problem called a slow website and no matter how hard you try to optimize it nothing just seems to work. We were so busy building all the other pieces that we almost forgot the most important factor. Speed! And Google loves speed.

Well, we are here to rescue you!

  • An unoptimized theme
  • A heavy page builder
  • Unnecessary styles and scripts loading on the page
  • Not all but some plugins do affect the page speed
  • Overly large size images
  • Styles or scripts blocking the page content
  • Slow server


There is an ocean of plugins in WordPress for optimization. But we have tried to pull out some of the best that will save your time.

The upgraded version from 5.5 WordPress gives lazy loading of images by default.” (Lazy Loading means images wait to load until they’re just about to scroll into view.) “As a result images won’t affect the page loading, and posts and pages will load faster.”

But still you should always optimize your large images.


Hummingbird – Speed Optimize, Cache, Minify & Defer Critical CSS & JavaScript by WPMU DEV

Hummingbird is an all-in-one plugin. In other words, you don’t need to install different plugins to solve different purposes. It has both free & paid versions though its free version is also quite good. Because it covers almost every tactic you require to get a succeeding page score.


  • File compression
  • GZIP compression 
  • Asset Optimization
  • Eliminate render-blocking resources by deferring CSS and JS
  • Minify CSS and JS
  • Combine CSS or JS
  • Lazy Load integration
  • World-class caching
  • One-click site performance test


A key point is it provides a one-click site performance test within the plugin. It will show you tips & tricks too.

An excellent feature of Hummingbird is asset optimization. It lists out all the JS, CSS & Font files that are being included whether by any plugin or theme, or core.

This gets handy. Because this allows you to handle unloading useless files, compress individual script/styles to reduce their size, move them to the footer to avoid render-blocking, combine multiple files to lesser the requests, etc. 

‘But remember, every time you unload or combine any file test the website thoroughly to avoid any error or page design clutter.’

As a result, this technique will actually make a difference to your page speed score.



Asset CleanUp: Page Speed Booster by Gabriel Livan

Asset CleanUp is another good plugin that is there. It has both free & paid versions.


  • Eliminate render-blocking resources by unloading useless CSS/JS (important for faster page load) 
  • Preload CSS/JS, Local Fonts & Google Fonts files
  • Minify CSS and JavaScript files
  • Combine CSS & JavaScript files
  • Inline CSS Files
  • Site-wide removal for Emojis, Dashicons for guest users, and Comment Reply if they are not used
  • Reduces the HTML code of the actual page (that’s even better if GZIP compression is enabled)
  • Apply “font-display” CSS property to all loaded Google Font requests
  • Combine all Google Font requests into fewer requests

and more.


The major key point of Asset CleanUp is it scans and detects all the assets(CSS/JS/Fonts) that are loaded on the page and lists them out on every individual page. In other words, a page specific unloading of assets.

For example, if you are using a plugin that generates contact forms, and if it is being used only on the contact page then we don’t want its CSS & JS files to load on every page then just on the contact page.

Combining HummingBird and Asset Cleanup work great together too.



Autoptimize by Frank Goossens

Autoptimize is a simple yet very popular plugin that is there when it comes to optimization. It is easy and straightforward to configure. It also has free and premium versions. 


  • Aggregate scripts and styles
  • Inline critical CSS 
  • Defer the aggregated full CSS, 
  • Moves and defers scripts to the footer
  • Minify scripts and styles
  • Minifies HTML
  • Optimize and lazy-load images, 
  • Optimize Google Fonts, 
  • Async non-aggregated JavaScript, 
  • Remove WordPress core emoji cruft 

and more.


Your page speed score will be on boost with Autoptimize.



Jetpack by Automattic

Jetpack is another great all-in-one plugin. It not only gives site performance tools but also provides security. It has a paid version too.

Jetpack offers free CDN which is a major key factor of it. CDN (Content Delivery Network), which means once you connect your site with Jetpack you can just start using this service. And all your images & files will be now loaded from their own global server and not yours. This results in a faster page speed score.


  • Brute-force attack protection, spam filtering, and downtime monitoring.
  • Backups of your entire site
  • Secure login, with optional two-factor authentication.
  • Malware scanning, code scanning, and automated threat resolution.



Jetpack optimizes your images and serve them from their own powerful global network, and speed up your mobile site to reduce bandwidth usage. Connect Jetpack to take advantage of:

  • Images and static files, like CSS and JavaScript, served from our servers, not yours.
  • Elasticsearch-powered related content and site search, for relevant results with no drain on your servers.
  • Lazy load images for a faster mobile experience.
  • Unlimited and high-speed video via our content delivery network.


Your page speed score will be on fly with Jetpack.


Hope this was helpful.

If you are looking for wordpress optimization experts to speed up your slow website. Check out our services or contact us now!


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