Seraphinite Accelerator 2.29.27 – WordPress Page Cache & Core Web Vitals Optimiser

Description

Seraphinite Accelerator takes an aggressive approach to speed. Besides a disk page cache that revalidates in the background, it rewrites pages on the way out: it separates critical CSS, lazy-loads images and iframes, delays non-essential JavaScript until interaction, and can inline or combine assets.

It is aimed at people who care about PageSpeed and Core Web Vitals numbers and are willing to spend a little time tuning. It works alongside WooCommerce and most page builders, handles separate mobile caches, and includes CDN rewriting. As with any optimiser of this kind, test pages after each change.

Key features

• High-performance file page cache with background revalidation
• Critical CSS generation and non-critical CSS deferral
• Delayed JavaScript loading until user interaction
• Lazy loading and optimisation for images, iframes and videos
• Separate cache for mobile, logged-in users and WooCommerce sessions
• CDN URL rewriting and cache warm-up

Best for

• Site owners chasing better Core Web Vitals
• WooCommerce stores on shared or mid-range hosting
• Developers comfortable fine-tuning optimisation rules

Requirements

• WordPress 4.5+ and PHP 7.4+ recommended
• Write access to wp-content for cache files
• Only one page-cache plugin active at a time

What you get

• The original, unmodified Seraphinite Accelerator plugin files, version 2.29.27 (updated 19 September 2026)
• Released under the GPL licence
• Use it on as many sites as you own or build for clients
• Instant download from your Moryvanta account after checkout

Good to know

• Moryvanta is an independent GPL redistributor and is not affiliated with or endorsed by Seraphinite Solutions. Product names and trademarks belong to their owners.
• Important: the GPL covers the plugin files and updates, but Seraphinite’s extended features are unlocked with the developer’s own licence key, which is not included. If an activation key is requested during setup, that licence must be purchased separately. Contact Moryvanta support and we’ll help – a licence through Moryvanta where available, or we’ll point you to Seraphinite Solutions.
• Without a valid key the plugin behaves like the free edition, so the premium optimisation set (and some image/CDN services) depends on the vendor licence – check this before buying.
• Any activation keys published on third-party sites are not ours to give and should not be used.
• Moryvanta support covers downloading and installing the files.

Frequently asked questions

What is Seraphinite Accelerator?

It is a WordPress speed plugin combining page caching with CSS, JavaScript and image optimisation to improve Core Web Vitals.

Can I use it with another cache plugin?

Run only one page cache at a time; disable other caching plugins before enabling it.

Does it support WooCommerce?

Yes, it handles cart and session pages so shoppers never see cached personal data.