keytool is not recognized as an internal or external command How to fix this on Windows
'keytool' is not recognized as an internal or external command: How to fix this on Windows
if you don't have JDK
Keytool is included as part of the Java runtime.
To install Java, visit the JAVA SE Downloads page.
Download JDK
add Java to your PATH variable
For example: C:\Program Files\Java\jdk1.8.0\bin