1. Install JDK on your machine.

2. In JDK files navigate to bin folder and copy it's path. ex: C:\Program Files\Java\jdk-17\bin

3. Open command prompt window.

4. run the command :

   cd C:\Program Files\Java\jdk-17\bin

5. run the command :

   keytool -export -rfc -keystore D:\Users\Documents\AppAndriod\app\keystore\certificate.jks -alias my_alias -file D:\Users\Documents\AppAndriod\app\keystore\certificate.pem

6. Enter your key's password in the command prompt.

7. Your .pem key will be generated successfully.

Note that :

1. D:\Users\Documents\AppAndriod\app\keystore\certificate.jks is the path of your current .jks key that you want to convert to .pem
2. my_alias is the alias name of your key.
3. D:\Users\Documents\AppAndriod\app\keystore\certificate.pem is the path and file name of the new .pem key to be created after you run the command