Page Builder Sandwich: Speed and SEO

What it does

• Loads only what each page uses — CSS and JavaScript for a block load only on pages that actually contain that block. A blog post pays nothing for a slider used on the home page.
• One small generated stylesheet per page — Styles are compiled into a cached file per page instead of inline style soup, and cleared automatically when you edit.
• No jQuery, modern lightweight scripts — Interactive blocks (tabs, accordions, sliders) use WordPress's own Interactivity API: tiny, fast, and they work before the page finishes loading.
• Layout-shift guard — Images, videos, embeds and sliders reserve their space before loading, fonts swap without jumping, and the editor warns you when something will cause layout shift (CLS).
• Automatic main-image priority — The biggest image at the top of a page is detected and loaded first; everything below the fold is lazy-loaded.
• Google Fonts hosted on your own site — Fonts are downloaded to your site instead of loading from Google: faster and GDPR-friendly.
• Clean, light HTML — Minimal wrapper elements, so pages stay small and easy for search engines and AI crawlers to read.
• Compatible with caching plugins — Tested with LiteSpeed Cache, WP Rocket, W3 Total Cache and Zinn Cache, and clears their cache when you publish.
• Critical CSS for the top of the page (Pro) — The styles needed for the first screen are inlined so the page paints instantly; the rest loads after.

Free or Pro

A feature marked (Pro) needs a Pro licence; (Agency plan) needs the Agency plan. Everything else is in the free edition.