Safe to turn on, fast by default
A full performance toolkit, free
The optimization engine is free and never disables itself without a license. Smart defaults are on the moment you activate.
Full-page caching
Static HTML for logged-out visitors, auto-purged on edits.
Cache preloading
Re-warms the cache from your sitemap after a purge.
Remove Unused CSS
Strips unused rules with a WooCommerce and builder safelist.
Critical CSS
Inlines above-the-fold CSS to stop unstyled flashes.
Self-host fonts
Serves Google Fonts locally with font-display swap.
Delay JavaScript
Holds non-essential scripts until the first interaction.
WebP & AVIF
Converts images to modern formats, originals always kept.
Responsive LCP preload
Preloads the exact hero image the browser will render.
Asset audit
Lists every script and style a page loads, blocking or not.
Image scanner
Finds large images and converts, resizes, and compares.
Database cleanup
Clears revisions, transients and orphaned metadata.
CDN URL rewrite
Rewrites asset URLs to your CDN host. Pro.
Activate, verify, ship
Free engine, Pro adds CDN
The optimization engine is genuinely free and never nags you. Pro adds CDN rewriting, priority support, and automatic updates.
Free - $0 CAD
The full optimization engine: page caching, Remove Unused CSS, Critical CSS, self-hosted fonts, Delay JS, WebP and AVIF, LCP preloading, the asset audit, image scanner, and database cleanup. Never disables itself without a license.
Free download →Pro - $50/yr
Everything in Free, plus CDN URL rewriting for CSS, JS, images and fonts, priority support, and automatic updates from the self-hosted c7.ca channel.
Get Pro →Specs
C7 Speed technical summary.
Platform
WordPress 6.0+, PHP 8.0+.
Caching
Full-page cache, preloading, browser cache headers.
CSS
Deferral, Remove Unused CSS, Critical CSS, self-host fonts.
JavaScript
Deferral, Delay JS, jQuery to footer, local analytics.
Images
WebP and AVIF, resizing, lazy loading, LCP preload.
Safety
WooCommerce-safe, Safe Mode, Test Mode, per-page overrides.
Frequently asked questions
Will it break my WooCommerce store?
No. The page cache skips carts, checkout, account and any WooCommerce session, and the Remove Unused CSS safelist protects store classes.
Is the optimization engine free?
Yes. The full engine is free and never disables itself without a license. Pro only adds CDN rewriting and priority support.
How do I troubleshoot a display issue?
Add ?c7s_safe=1 to any URL as an admin to bypass every optimization instantly, with no settings changed.
Does it replace server caching?
No. It is designed to complement server-level caching like SiteGround SuperCacher, WP Engine and Cloudflare.
Can I test before going live?
Yes. Test Mode applies optimizations only for logged-in admins so you can verify everything first.
