Capo – Head Optimizer
In standard WordPress sites, WordPress Core, themes, SEO plugins, analytics scripts, and third-party plugins inject elements into wp_head() in arbitrary order. This can lead to critical performance pitfalls:
- Delayed Title Tag Rendering: SEO metadata and large JSON-LD blocks placed before
<title>. - Delayed Resource Discovery: Preconnects, preloads, and async scripts pushed below dozens of CSS stylesheets.
- Render-Blocking Bottlenecks: External synchronous scripts blocking CSS and parser execution.
Capo solves this automatically. By intercepting the page response via output buffering, Capo uses a deterministic, stable sorting algorithm to reorder <head> elements strictly according to browser critical rendering path priorities.
The Capo Head Priority Spectrum
Capo organizes elements into 11 strict priority tiers (Weight 10 down to 0):
- Weight 10 (Critical Meta & Viewport):
<base>,<meta charset>,<meta name="viewport">, criticalhttp-equivheaders (CSP, origin-trial, accept-ch). - Weight 9 (Title):
<title>. - Weight 8 (Preconnect):
<link rel="preconnect">. - Weight 7 (Async Script):
<script src="..." async>. - Weight 6 (CSS @import Styles):
<style>blocks containing@importrules. - Weight 5 (Sync / Inline Scripts): Synchronous/inline JavaScript (
<script>without defer/async). - Weight 4 (Stylesheets & Style Blocks):
<link rel="stylesheet">,<style>blocks. - Weight 3 (Preload):
<link rel="preload">,<link rel="modulepreload">. - Weight 2 (Defer Script):
<script src="..." defer>,<script src="..." type="module">. - Weight 1 (Prefetch / Prerender):
<link rel="prefetch">,<link rel="dns-prefetch">,<link rel="prerender">,<script type="speculationrules">. - Weight 0 (Other Metadata): OpenGraph, Twitter cards, Schema JSON-LD, RSS feeds, favicons, robots metadata.
Features
- Zero Configuration: Activate the plugin and your
<head>is immediately optimized. - Deterministic Stable Sort: Equal-weight elements retain their exact relative order, preserving CSS cascade specificity and JavaScript dependencies.
- Full Cache Compatibility: Works seamlessly with WP Super Cache, W3 Total Cache, WP Rocket, LiteSpeed Cache, and Cloudflare.
- Safe HTML Tokenizer: Respects HTML comments, conditional comments (
<!--[if ...]>), CDATA blocks, and inline script markup. - Site Health & Admin Diagnostics: Real-time
<head>hygiene warnings and diagnostic status in Tools > Site Health and Admin Toolbar. - Testing & Bypass Mode: Append
?capo=offto any frontend URL to inspect the un-reordered head.
Details
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