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.

Easy Critical CSS

Seth Alling

Easy Critical CSS is a lightweight WordPress plugin that lets you add Critical CSS to any page on your site to improve loading speed and performance.
Features: 
– Easily add Critical CSS and Secondary CSS to any page 
– Secondary CSS removes unused CSS rules and stylesheets, ensuring only a single optimized CSS file loads 
– Supports posts, pages, archives, and taxonomy pages 
– Fully compatible with caching plugins (WP Rocket, W3 Total Cache, WP Super Cache, etc.) 
– Customizable settings for individual pages 
– Stores Critical CSS in your choice of the database or as static files 
– Optional API service (API key required) for automated Critical and Secondary CSS generation via <a href="https://criticalcss.net/" rel="nofollow ugc">CriticalCSS.net</a> 
– Background processing to generate CSS without blocking page loads or admin actions
<h3>Why Use Critical CSS?</h3>
Critical CSS ensures above-the-fold content loads first by reducing render-blocking CSS. This helps you boost Core Web Vitals, improve page speed scores, and deliver a better experience to your visitors.
Want to try it out first? You can generate free one-off Critical CSS at <a href="https://criticalcss.net/#free-generator" rel="nofollow ugc">CriticalCSS.net</a> and manually apply it to your site using the plugin settings.
<h3>External services</h3>
This plugin interacts with external third-party services in order to provide its functionality. Below is a detailed breakdown of these interactions:
<ol>
<li>
Critical CSS API (api.criticalcss.net) 
This service generates critical and secondary CSS used to optimize your site’s CSS delivery and improve page load times.
<ul>
<li>Data Sent: The URL, CSS generation preferences, generation status, and HTML content of pages from your website.</li>
<li>When: Data is transmitted only if you have explicitly enabled the Auto generation mode, and occurs whenever Critical CSS or Secondary CSS needs to be generated or regenerated.</li>
<li>Links: <a href="https://criticalcss.net/terms/" rel="nofollow ugc">Terms of Service</a>, <a href="https://criticalcss.net/privacy/" rel="nofollow ugc">Privacy Policy</a>.</li>
</ul>
</li>
<li>
Cloudflare API (api.cloudflare.com) 
This service is used to automatically clear your Cloudflare cache after new critical CSS is generated, ensuring your visitors see updated styles immediately.
<ul>
<li>Data Sent: Authentication credentials (Cloudflare email, API key, and zone ID) and instructions for purging the cache.</li>
<li>When: Data is sent only if <code>CLOUDFLARE_EMAIL</code>, <code>CLOUDFLARE_API_KEY</code>, and <code>CLOUDFLARE_ZONE_ID</code> are defined in your site’s configuration.</li>
<li>Links: <a href="https://www.cloudflare.com/terms/" rel="nofollow ugc">Terms of Service</a>, <a href="https://www.cloudflare.com/privacypolicy/" rel="nofollow ugc">Privacy Policy</a>.</li>
</ul>
</li>
<li>
Kinsta Cache Clear (localhost) 
If your site is hosted on Kinsta, this plugin can trigger a cache clear after generating new critical CSS, ensuring immediate availability of updated styles.
<ul>
<li>Data Sent: A cache-clear request to your site’s local server endpoint provided by Kinsta. No sensitive or identifying information is transmitted beyond the local environment.</li>
<li>When: Data is sent only when your site detects that it’s running on Kinsta infrastructure (<code>KINSTA_CACHE_ZONE</code> environment variable is present).</li>
<li>Links: <a href="https://kinsta.com/legal/terms-service/" rel="nofollow ugc">Kinsta Terms of Service</a>, <a href="https://kinsta.com/legal/privacy-policy/" rel="nofollow ugc">Kinsta Privacy Policy</a>.</li>
</ul>
</li>
<li>
Freemius API (api.freemius.com and wp.freemius.com) 
Used to manage licensing, validate API keys, and handle plugin updates and account management.
<ul>
<li>Data Sent: Freemius sends and receives licensing information and plugin activation status, including your site’s URL, plugin version, API key, and licensing details.</li>
<li>When: Data is transmitted only after explicitly opting in through the plugin’s settings page or upon activation of a purchased API key. By default, the plugin does not send any data to Freemius until you explicitly opt in.</li>
<li>Links: <a href="https://freemius.com/terms/" rel="nofollow ugc">Freemius Terms of Service</a>, <a href="https://freemius.com/privacy/" rel="nofollow ugc">Freemius Privacy Policy</a>.</li>
</ul>
</li>
</ol>

Easily inject Critical CSS and Secondary CSS (with unused CSS styles removed) to improve site speed and performance.

fepo — Performance & GEO Audit vs Easy Critical CSS