API Tester - REST Client Testing Tool

API Tester - REST Client Testing Tool is a free and powerful Chrome extension designed to develop, test, and debug RESTful APIs and HTTP requests. Featuring an easy-to-use interface, it offers more capabilities than many traditional tools.

Key features include saving and syncing favorite requests with headers and payloads, viewing request history with filters, customizable request headers, and support for standard HTTP methods (GET, POST, PUT, DELETE) plus user-defined methods. Responses are shown with beautiful syntax highlighting for JSON, XML, HTML, and CSS. Additional conveniences include HTTP Basic Authentication, request timing, dark mode, responsive design, and seamless integration with your Google account. This extension is 100% free and keeps your data private while facilitating efficient API testing and development.