How to see a certificate keysize using keytool?

Question

When the certificate is created it is possible to configure -keysize option for command genkeypair .

Is it possible to see a certificate keysize using keytool?

I have tried these options without success:

keytool  -list –rfc

keytool  -list –v

Was not able to find it here: https://docs.oracle.com/javase/8/docs/technotes/tools/unix/keytool.html#keytool_option_list

Answer 1

This is not possible with keytool, but there is a GUI alternative called " KeyStore Explorer " that shows the key size:

Answer 2

Actually, if I run the following command I will see the bit size listed under my Alias

keytool -list -v -keystore {name of keystore}

The following are lines I see on my private certificate (non-root cert)

Subject Public Key Algorithm: 2048-bit RSA key