PlugoSpeed is a WordPress performance plugin that combines page caching, asset optimization, and Core Web Vitals improvements in a single lightweight package.

It generates static HTML cache files served directly from disk via Apache — bypassing PHP and WordPress on cached requests.

A React 18 dashboard shows your cache hit rate and PageSpeed score — no jQuery required.

Core Features (Free)

Static HTML Cache
Pages are stored as static .html files on disk. Apache serves them directly — no PHP, no database, no WordPress bootstrap. Cache TTL is configurable (default: 24 hours).

HTML Minification
Removes unnecessary whitespace and comments from the final HTML output, reducing page size without affecting content or functionality.

CSS Minification
Minifies stylesheet files inline, reducing transfer size. Combine is intentionally disabled by default for HTTP/2 compatibility.

JavaScript Defer
Adds defer to non-critical scripts, improving Time to Interactive (TTI) and Largest Contentful Paint (LCP) scores on mobile.

Image Lazy Loading
Adds native loading="lazy" to images and iframes below the fold. Injects explicit width and height attributes to reduce Cumulative Layout Shift (CLS).

Database Cleanup
Scheduled cleanup of post revisions, auto-drafts, spam comments, and expired transients. Configurable schedule: daily, weekly, or monthly.

Cache Preloading
After purge, PlugoSpeed re-warms the cache automatically by walking your XML sitemap. Rate-limited to avoid server overload.

Auto Cache Purge
Cache is invalidated on post save, theme change, plugin activation, and WooCommerce stock/price updates.

PageSpeed Dashboard
Tracks your Google PageSpeed Insights score over time. Shows today’s cache hit rate and the number of cached pages.

Pro Features

Remove Unused CSS (RUCSS)
Generates a per-page stylesheet containing only the CSS rules that are actually used. Eliminates render-blocking CSS from page builders and plugin stylesheets. Requires a PlugoPress API key.

Critical CSS
Inlines the above-the-fold CSS directly in <head>, eliminating render-blocking for a faster LCP. Requires a PlugoPress API key.

WebP Image Serving
Automatically serves .webp versions of images to supported browsers.

Upgrade to Pro plugopress.com/plugospeed/

Compatibility

PlugoSpeed is tested and verified compatible with:

Page Builders: Elementor, Divi, Beaver Builder, Bricks, Oxygen, WPBakery
Themes: Astra, GeneratePress, Kadence, Hello Elementor, OceanWP, Blocksy, Neve, Flatsome
E-Commerce: WooCommerce (cart exclusion, stock purge, vary by currency)
Multilingual: WPML, Polylang (vary cache by language)
SEO: Rank Math, Yoast SEO, All in One SEO
CDN: Cloudflare (Pro: API purge integration)

Technical Highlights

Apache .htaccess rules serve cached HTML before PHP loads
advanced-cache.php drop-in captures misses and writes cache files
Optimizer pipeline: Image JS CSS HTML (order matters for correctness)
WooCommerce cart/checkout pages are automatically excluded from cache
Logged-in users never receive cached pages (preserves nonces and personalisation)
Action Scheduler handles background jobs (preload, cleanup, RUCSS generation)
REST API powers the dashboard — all actions are nonce-protected with manage_options capability checks

External Services

This plugin connects to the following external services:

Google PageSpeed Insights API

Purpose: Measures your site’s performance score and Core Web Vitals (LCP, CLS, FID)
When it is called: Only when viewing the PlugoSpeed dashboard or when a manual refresh is triggered by the site administrator
Data transmitted: Your site’s public URL — no personal data is sent
Terms of Service: https://developers.google.com/terms
Privacy Policy: https://policies.google.com/privacy

PlugoPress Cloud API (api.plugopress.com)

Purpose: Powers Pro features: Remove Unused CSS (RUCSS) and Critical CSS generation
When it is called: Only when a valid API key is configured by the site administrator AND the corresponding Pro feature is enabled
Data transmitted: The page URL and rendered HTML of the requested page, used solely for CSS analysis
Terms of Service: https://plugopress.com/terms
Privacy Policy: https://plugopress.com/privacy-policy

PlugoPress Badge Service (plugopress.com)

Purpose: Displays a performance badge in the PlugoSpeed dashboard
When it is called: When the dashboard is viewed and a PageSpeed score is available
Data transmitted: Only the numeric PageSpeed score is included in the image URL — no personal data is sent
Terms of Service: https://plugopress.com/terms
Privacy Policy: https://plugopress.com/privacy-policy

PlugoSpeed

About this plugin