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KeyCDN

Lightweight disk cache from CDN provider KeyCDN

Overview

Cache Enabler is a free, lightweight caching plugin published by KeyCDN, a content delivery network provider. It has been listed on WordPress.org since October 2015 and reported 100,000+ active installations in November 2026.[19]

The plugin captures page output and saves it as static HTML files on the server’s disk; accepted files are then delivered without database queries or on-the-fly compression.[19] Features listed on its directory page include automatic smart cache clearing when content changes, manual and WP-CLI cache clearing, cache expiry, mobile support, Brotli and Gzip pre-compression, HTML minification with optional inline CSS and JavaScript, support for custom post types and 304 Not Modified responses. WebP delivery is supported when images are converted with KeyCDN’s Optimus service, and the plugin is documented as working with Autoptimize for asset optimisation.[19]

Cache Enabler’s minimal design is both its strength and its limitation: it adds little overhead and has few settings to misconfigure, but it does not include critical CSS, JavaScript delay, image optimisation or object caching. It requires PHP 5.6 or later according to its directory listing, making it one of the most broadly compatible options.[19]

KeyCDN features

  • 60+ data centres in 40+ countries
  • Usage billing, no plan commitment
  • Volume tiers to US$0.01/GB
  • Regional price tiers
  • Static HTML disk cache
  • Automatic cache clearing on updates
  • WP-CLI cache commands
  • Brotli and Gzip pre-compression

KeyCDN pricing

North America/Europe: US$0.04/GB (first 10 TB), US$0.03 (next 40 TB), US$0.02 (next 50 TB), US$0.01 (over 100 TB). Asia/Oceania from US$0.08; Africa/Latin America from US$0.10. Minimum US$4/month usage; US$49 minimum payment.

KeyCDN strengths and limitations

Strengths

  • Simple published per-GB pricing
  • Low monthly minimum
  • Easy setup for static assets
  • Very small footprint
  • Few settings to get wrong
  • WP-CLI support for automation

Limitations

  • Smaller network than larger providers
  • US$49 minimum top-up
  • Limited bundled security and edge compute
  • No CSS or JavaScript optimisation beyond HTML minification
  • No object cache integration
  • WebP support tied to a separate KeyCDN service

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