Java and Node.js Utilities for Managing JSON/YAML Java:

Jackson: A widely-used library for parsing and generating JSON. It also supports YAML through the jackson-dataformat-yaml module.

SnakeYAML: A YAML parser and emitter for Java, suitable for reading and writing YAML configurations. Eclipse Marketplace

Node.js:

js-yaml: A JavaScript YAML parser and dumper, useful for reading and writing YAML files.

fs (File System): Node.js's built-in module for file operations, enabling reading and writing of JSON/YAML files. Stack Overflow

Web-Based Editors for JSON/YAML To allow customers to edit configurations via a web interface:

JSONEditor: A web-based tool to view, edit, format, and validate JSON. It offers various modes like tree, code, and text editors and can be integrated into your web application. GitHub

Swagger Editor: Primarily for OpenAPI specifications, but can be adapted for general YAML editing. It provides real-time preview and validation. SourceForge

Ace Editor: An embeddable code editor written in JavaScript. It supports syntax highlighting for various languages, including JSON and YAML. Ace Editor

Web-Based IDEs for Integration For a more comprehensive editing experience:

Eclipse Che: An open-source, Java-based developer workspace server and online IDE. It supports multiple languages and can be customized with plugins. Wikipedia

Eclipse Wild Web Developer: An Eclipse IDE plugin that provides rich editing support for web development languages, including JSON and YAML, with features like validation and code completion. GitHub

Implementing Dynamic Configuration Management To allow runtime configuration changes without redeployment:

Backend API: Develop RESTful endpoints in your Java backend to handle fetching and updating configuration files.

Frontend Integration: Embed a web-based editor (like JSONEditor) in your React application to provide a user-friendly interface for editing configurations.

Validation: Implement schema validation to ensure the integrity of configuration files before applying changes.

Hot Reloading: Incorporate mechanisms to reload configurations at runtime, such as watching for file changes or triggering reloads upon updates.

By integrating these tools and approaches, you can provide a seamless experience for your customers to manage configuration files dynamically within your application