Hi Navapradha,
Yes, you can convert your swagger JSON file into wadl file.
There are an API Testing tool knowns as soap UI in which you can upload ur swagger file and export a WADL out of it.
Go to SOAP UI and create an empty project then right click on the project and click import swagger.
After importing swagger file there will be autogenerated operations of your service.
Just again right click ur project and click on export wadl.
This is how you can get your wadl file.
Please correct me if I am wrong.
Regards,
Irfan