Autoptimize vs Converter for Media

Compare WordPress plugins and tools side by side. Pick products with “Compare” in the software directory.

Feature Autoptimize v3.1.16 · checked 23 Oct 2026 Free + paid · ★ 4.7/5 Visit Details Converter for Media v6.7.0 · checked 23 Oct 2026 Free + paid · ★ 4.9/5 Visit Details
At a glance
Active installs 800,000+ 500,000+
Last updated September 26, 2026 October 14, 2026
Editions Autoptimize · Autoptimize Pro ($) Converter for Media · Converter for Media PRO ($)
Pros Aggregates and minifies CSS and JavaScript; Lazy-loads images with WebP and AVIF support; Works without changing theme code Converts uploads to WebP on the server with GD or Imagick; Optional Cloudflare cache rules and cache purge; Core WebP conversion works without a licence
Cons Aggressive script changes can break pages and need testing; Page cache, CDN and critical CSS need the paid Pro version AVIF output and cloud conversion need the PRO licence; Upgrade prompts appear in the admin and plugin list; Cloud conversion sends images to a vendor API
More features
Other features CSS and JavaScript aggregation and minification, Image lazy-load and WebP and AVIF settings, Extra options for fonts, emoji and script placement, Critical CSS through the criticalcss.com premium API ($), Pro upgrade tab in the admin Local WebP conversion with GD or Imagick, Serve WebP through rewrite rules, Convert on upload, Cloudflare cache rules and purge, AVIF output format ($), Cloud conversion through the vendor API ($), PRO access token validation ($)
Integrations
Other criticalcss.com ($), Google Fonts Cloudflare, Converter for Media API ($), Deactivation survey endpoint
Requires WordPress 5.3 4.9
Requires PHP 7.4 7.4
Tested up to 7.1 7.1
Phones home No No
External services criticalcss.com, misc.optimizingmatters.com api-converter.mattplugins.com, data.mattplugins.com, api.cloudflare.com