Every post type has a specific name. In that unique name lies a problem. Some post types are called “calendar” and some are called “my_other_calendar”. These unique names can become a problem when building custom templates, shortcodes, or queries for your WordPress install. Query All The Post Types is a free WordPress plugin helping WordPress website owners, and developers, view of all the active post types, custom post types & associated taxonomies currently registered on your WordPress install.
Each post type is defined as a Regular CPT, Hidden CPT, WordPress Core – Regular CPT, WordPress Core – Hidden CPT, Regular CPT, Hidden CPT, WooCommerce Core Regular CPT, WooCommerce Core Hidden CPT, and Other. Query All The Post Types displays some object data for each post type. Object data includes: post type name, plural name, singular name, menu name, is public queryable, is hierarchical.