OPcache Manager is a free WordPress plugin designed for managing OPcache operations directly from the admin dashboard. It offers features such as individual script invalidation, forced invalidation, and a manual site invalidation option that allows users to reset OPcache for specific sites on shared servers. Users can also pre-compile site files with the manual warm-up feature and schedule invalidation and warm-up tasks to enhance site performance.

In addition to management capabilities, OPcache Manager provides analytics reporting, displaying key performance indicators like hit ratio, free memory, and cached files. It supports multisite report delegation and includes WP-CLI commands for cache management. This open-source tool is part of the PerfOps One suite, significantly improving the observability and operational performance of WordPress sites.