Restler 
Restler has been built with simplicity and ease of use in mind. It allows you send custom HTTP/HTTPS requests and test your REST API anywhere and anytime.
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Features
- Requests you send are automatically saved so that you can come back and review at any time;
- Save and organize your requests in folders and load requests without writing its attributes again;
- Favorite requests and folders so they can be shown at the top and accessed quickly;
- Edit body, url parameters and headers attributes easily;
- Parses and displays the complete raw response including headers, cookies, status, etc;
- Supports gzip, deflate and brotli decompression formats;
- Restler supports the most common HTTP methods (GET, POST, PUT, DELETE, HEAD, PATCH, OPTIONS) and custom methods;
- Supports Basic, Bearer Token, Hawk and Digest authentication methods;
- Import collections from Postman, Insomnia (JSON and YAML) or Restler format;
- Export collections to Postman, Insomnia (JSON) or Restler format;
- Manage cookies and send them with your request;
- Quickly copy the response body, headers and cookies received;
- Autocompletes headers with commonly-used values;
- Switch easily between HTTP, HTTPS and HTTP2;
- Beautify the response body received;
- Use tabs to keep multiple requests open at the same time and switch between them without losing data;
- Add Client Certificates, Proxy servers and DNS resolvers;
- Response Caching (RFC 7234);
- WebSocket & SSE;
- Workspace;
- Environment Variables;
