Autoptimize aggregates, minifies, and optionally defers CSS and JS — all of it via output buffering at render time. Unlike WP Rocket, LiteSpeed Cache, or WP Super Cache, it has no page cache of its own, so there's no second caching layer running alongside Static Shield's build. Its optional "Optimize Images" setting (off by default) works differently: confirmed by reading the plugin's own source, it rewrites image URLs to ShortPixel's hosted optimization service rather than optimizing locally — still static-friendly, but a real external dependency rather than a one-time local build step (see limitations).
Autoptimize's aggregation and minification is conceptually the same idea as Static Shield's own Neutral Asset Paths feature — running both isn't harmful, just redundant processing during the build; either one alone is normally enough.
No single mode applies — Autoptimize doesn't influence which serving mode a site should use; see the notes below for what it actually does.
Aggregated/minified CSS and JS are captured into the static release exactly as Autoptimize renders them. If image optimization is enabled, the rewritten ShortPixel URLs are captured the same way any CDN URL would be.
None — Autoptimize declares no public routes of its own.
None needed — Autoptimize declares no public routes of its own.
No special setup — detected automatically once active.
This hasn't been behaviorally validated against a real install with image optimization actually toggled on, though the ShortPixel mechanism itself was confirmed by reading the plugin's own source. Autoptimize saves its optimized CSS/JS to its own disk cache with content-hashed filenames — conceptually the same idea as Static Shield's own Neutral Asset Paths feature — so running both isn't harmful, just redundant work happening twice. Separately, if "Optimize Images" is enabled, every visitor's image request depends on ShortPixel's service being up, not just on this site — unlike a self-hosted CDN, that's a dependency Static Shield doesn't control.
Static Shield Lite is free to install and inspects your actual plugins, not just what's publicly visible.
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