This tool har-to-jmx-convertor try to simulate a script JMeter and a record xml file recording from the JMeter recording template. Since version 7.0, Websocket is manage with samplers from the plugin ...
If your Har file contains WebSocket Connection and Messages, check the checkbox ws_with_pdoornbosch (set true), this tool will try to create Websocket Samplers in the JMeter script generated and the ...