Hi @mahesh_gunaje
CRX, CRXDE, and CRXDE Lite are all related to the Content Repository for Java Technology API (JCR) used by Adobe Experience Manager (AEM).
1. CRX: CRX is the underlying content repository used by AEM. It is a Java-based implementation of the JCR specification and provides a hierarchical data store for content and digital assets. CRX is responsible for storing and managing all content in AEM.
2. CRXDE: CRXDE (Content Repository for Java Technology API Development Environment) is an Eclipse-based integrated development environment (IDE) that allows developers to create, edit, and debug Java code that interacts with the CRX repository. It provides a set of tools for working with JCR content, including a code editor, a content browser, and a debugger.
3. CRXDE Lite: CRXDE Lite is a web-based IDE that is included with the AEM quickstart package. It provides a simplified interface for developers to access and modify the repository in their local development environments within the browser. CRXDE Lite includes a code editor, a content browser, and a package manager.
https://experienceleague.adobe.com/en/docs/experience-manager-cloud-service/content/implementing/developer-tools/crxde
https://aem-development.com/knowledge-base/what-is-crx-in-aem/#:~:text=CRX%20in%20Adobe%20Experience%20Manager,and%20accessing%20content%20within%20AEM.