This plugin hasn’t been tested with the latest three major releases of WordPress. It may no longer be maintained or supported and may have compatibility issues when used with more recent versions of WordPress.

WP Simple Thimble


This plugin embeds or in-lines image/css/js content into the page before it’s loaded. This really improves page load speed scores, and can really improve actual load time if either the network connection is not blazingly fast, server side caching is used, or a combination of the two.

Warnings that are commonly eliminated in page load speed testing tools include

Optimize images
Leverage browser caching
Remove query strings from static resources
Specify image dimensions
Minify JavaScript
Minify HTML
Avoid bad requests
Avoid a character set in the meta tag
Avoid landing page redirects
Defer parsing of JavaScript
Inline small CSS
Inline small JavaScript
Minify CSS
Minimize request size
Optimize the order of styles and scripts
Put CSS in the document head
Serve resources from a consistent URL
Serve scaled images
Avoid CSS @import
Combine images using CSS sprites
Use a Content Delivery Network (CDN)
Reduce the number of DOM elements
Make fewer HTTP requests
Minify JavaScript and CSS
Put CSS at the top
Put JavaScript at bottom
Avoid AlphaImageLoader filter
Avoid CSS expressions
Reduce DNS lookups

The cases where some of these may still pop up would be a limitation of this project, and you’ll note that these are all limitations that are actively being developed to be fixed.


This section describes how to install the plugin and get it working.


  1. Upload the plugin files to the /wp-content/plugins/wp-simple-thimble directory, or install the plugin through the WordPress plugins screen directly.
  2. Activate the plugin through the ‘Plugins’ screen in WordPress

Frequently Asked Questions

I still see resources that weren’t embedded. What is the cause?

Right now the project this plugin depends on only handles images/css/js files, and it only handles resources found directly in the document. Furthermore, this plugin only handles js and css files that are properly enqueued. These are issues that will be remedied in future releases.


2 July 2018
It did indeed make my GT Metrix scores much higher; but at a cost. It adds Base64 code to your CSS and probably other places too. I have only found it in my CSS thus far. It also broke my styles, removed icons, caused other style-related issues… Wow! What a price to pay. I’ll keep my B rating with GT Metrix, if this is the cost of an A rating. No thanks!!!! Plugin sucks!!!!!!
28 March 2017
I just installed this plugin and got more than a 20% improvement in my GTMetrix scores – Awesome! However I’m experiencing the same issue as ‘tiashanee’. Wp admin icons are all missing and a few other icons on the front end of my site have stopped displaying as well. Would be great if you could sort out that bug. Also on Google Page Speed Insights I’m now getting the following error “An error occurred while fetching or analyzing the page.”
7 November 2016
Hello I’m new to wordpress. The plugin really helped my gtmetrix and yslow scores drastically however, when activated google speed insights sends back an error and states “An error occurred while fetching or analyzing the page.” and this goes away when plugin is deactivated. Also icons in my backend for plugins such as jet pack, woocommerce, products disappear and become little box outlines. On my frontend my search and cart icons are either box outlines as well or my search icon changes into a pair of red lips and the cart turns into a hammer on the mobile device display. Im sure that the plugin is not suppose to do this. It makes the site look broken from a customer stand point. Please advise.
Read all 8 reviews

Contributors and Developers

“WP Simple Thimble” is open source software. The following people have contributed to this plugin.


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Interested in development?

Browse the code, check out the SVN repository, or subscribe to the development log by RSS.