How To Generate Development And Release Key Hashes: (for windows ) 1- open you cmd and type this command : keytool - exportcert - alias androiddebugkey - keystore % HOMEPATH % \.android\debug . keystore | openssl sha1 - binary | openssl base64 Note:- make sure that your your environment variable is set for JAVA,other wise locate keytool.exe in your java folder and type the above command. In the above command locate the openssl.exe and write the full path ,only writing openssl may not work. openssl.exe exists inside "C:\OpenSSL-Win64\bin" if command is typed correctly then it will ask for keystore password. Default password for debug . keystore is " android " after successfully completing this process it will generate key value in the cmd. copy that and use it where it is required. remember it is Development Key Hash