fepo

fepo analyzes your website and reports concrete optimization potential — without changing a single file on your site.
What you get:
<ul>
<li>Performance score — Lighthouse + PageSpeed Insights, Core Web Vitals (LCP, INP, CLS), real-user data (CrUX)</li>
<li>AI Visibility (GEO score) — checks whether ChatGPT, Perplexity, and Google AI Overviews can read your content (Schema.org, robots.txt, structured content)</li>
<li>Fonts — how many KB you could save with subsetting / preloading</li>
<li>CSS — how much unused CSS is loaded</li>
<li>Images — which images can be converted to AVIF / WebP and the resulting savings</li>
<li>GDPR check (EU/DACH only) — which trackers fire before the user has given consent</li>
</ul>
The first audit is free — no account, no API key, no credit card. Click one button and you get a full performance and GEO breakdown.
For the full report — sandbox preview, optimized HTML download, waterfall analysis, security headers, accessibility (WCAG), DOM hygiene, and more — register for free at the fepo Portal.
The plugin does not modify your website. It is purely diagnostic — no files are changed, no CSS/JS is rewritten, no caching is configured. Your site stays exactly as it was.
<h3>External services</h3>
This plugin connects to portal.fepo.app, an external service operated by fepo, to perform the audit.
What is sent and when:
<ul>
<li>When you click “Start audit”: your site URL, WordPress version, PHP version, active theme name and version, list of active plugin slugs, site locale, and plugin version.</li>
<li>When you optionally register: your email address (encrypted at rest, used only for sending the login link).</li>
</ul>
What is NOT sent:
<ul>
<li>No personal data of your visitors</li>
<li>No content from posts, pages, or comments</li>
<li>No database contents</li>
<li>No file contents</li>
</ul>
The audit itself is performed by fepo’s server fetching your site’s public URLs (like any browser would). No private endpoints are accessed.
Users must explicitly consent to data transmission via a checkbox before the first audit. The consent is stored locally and can be revoked at any time by deactivating the plugin.
Terms of service: <a href="https://fepo.app/agb" rel="nofollow ugc">https://fepo.app/agb</a> 
Privacy policy: <a href="https://fepo.app/datenschutz" rel="nofollow ugc">https://fepo.app/datenschutz</a>

fepo — Performance & GEO Audit

Audit your site's performance, AI visibility (GEO), and GDPR compliance — directly in the WordPress dashboard. First audit free, no registration.

ensemblebd

<h3>Deprecated</h3>
This plugin is deprecated and will be removed in the future. 
It was coded back in 2019 when WpRocket did not have asynchronous support for CSS. 
Although this plugin operates at a lower level (main php buffer), which helps apply loadsCSS to ALL styles regardless of whether they conform to wp_enqueue or not, we recommend instead using WpRocket’s system: <a href="https://docs.wp-rocket.me/article/1266-load-css-asynchronously" rel="nofollow ugc">Load CSS Asynchronously</a>.
<h3>Description</h3>
Simple high performance plugin to enhance WP Rocket’s css output to use the loadCSS preload polyfill. 
This will ensure any css being loaded via the page output is deferred, and utilizing a preload [rel] attribute. 
Note: This will not affect admin pages. It’s designed only to process front-end pages.
It is recommended to enable the WP Rocket setting for “Optimize CSS”, which will provide your pages with inline Critical-CSS. 
That way an unstyled flash is not seen on page load (if properly configured of course).
This plugin will boost your <a href="https://developers.google.com/web/tools/lighthouse/" rel="nofollow ugc">Lighthouse</a> and <a href="https://developers.google.com/speed/pagespeed/insights/" rel="nofollow ugc">PageSpeed Insight</a> scores.
<h3>Plugin Mission</h3>
We hope that <a href="https://wp-rocket.me/" rel="nofollow ugc">WP Rocket</a> will implement this as a feature of their plugin. 
The existing <a href="https://docs.wp-rocket.me/article/1266-load-css-asynchronously" rel="nofollow ugc">Load CSS Asynchronously</a> only works for supported wp_enqueue styles, which not all plugins/themes properly utilize. 
For normal users, we recommend using WP Rocket’s system instead of this plugin.
<h3>Requirements:</h3>
<ul>
<li>If you intend for logged-in users to see the effect, you must enable WP-Rocket’s setting called “caching for Logged-In Users”</li>
<li>Alternatively, you can run the plugin without WP-Rocket, despite it’s intended purpose. (>^.^)></li>
</ul>
<h3>Features:</h3>
<ul>
<li><a href="https://github.com/filamentgroup/loadCSS/tree/v2.0.1" rel="nofollow ugc">FilamentGroup’s LoadCSS(v2.0.1)</a> inline injector 
(optional – see settings page next to WP Rocket), triggered via wp_head </li>
<li>High performance Regular Expression approach to process WP Rocket’s (php’s) output buffer, to replace stylesheets with the appropriate loadCSS syntax </li>
<li>Option to enable the buffer processor when you don’t have WP Rocket installed. 
** This will respect AMP pages, and Yoast Sitemap output (by not executing). No other considerations have been implemented. </li>
</ul>
No fluff. Just a robust loadCSS implementation.
You can see how it works, & measure the performance, with this(via repl.it): <a href="https://repl.it/@ensemblebd/WPRocketLoadCSSMeasurement" rel="nofollow ugc">Run the Plugin’s code</a> 
Just paste your own page’s url or html into the appropriate variable @ the top.
And you can test this plugin’s regex as well: <a href="https://regex101.com/r/xsugT7/1/" rel="nofollow ugc">WordPress.com html – links filtered by regex</a>
Github link is here: <a href="https://github.com/ensemblebd/wp-rocket-loadcss" rel="nofollow ugc">Click</a>
<h3>Last tested with:</h3>
<ul>
<li>WP Rocket 3.13.x</li>
<li>WordPress 6.2.x</li>
</ul>
<h3>Dependencies</h3>
<ul>
<li>WP Rocket (optional via settings) </li>
<li>file_get_contents() php function (if included loadCSS lib is used via options — default = yes)</li>
</ul>

fepo — Performance & GEO Audit vs WP Rocket | Simple LoadCSS Preloader