James James - 1 month ago 4
Android Question

Find the key hash for a signed app

I have signed my app and exported it to a folder on my desktop called app in this folder is my app itself and the keystore. How do i find the key hash that i can copy into the facebook developers page. i have openssl installed but cant seem to generate the key hash ive tried many other threads on stack and none have seemed to help, thanks


  1. You should know where is your keystore file. For me is C:\Users\Selvin\Desktop\selvin.kp
  2. You should know your alias in keystore. For me is selvin
  3. You should know path to keytool. C:\Program Files\Java\jdk1.6.0_22\bin\keytool.exe
  4. You should know path to openssl. C:\OpenSSL-Win32\bin\openssl.exe
  5. You should know password to keystore. For me is * hehe

Then, you should call:

C:\Program Files\Java\jdk1.6.0_22\bin\keytool.exe" -exportcert -alias selvin -keystore c:\users\selvin\desktop\selvin.kp | C:\OpenSSL-Win32\bin\openssl sha1 -binary | C:\OpenSSL-Win32\bin\openssl base64

Replace my path and alias with proper ones.

Then you should see:

Enter keystore password:

Enter your password and you should get something like this: NfhDlIH7XWJzUZRjL+pZySrMX1Q=

EDITED: NfgDlIG7XWJzUZRUL+bZySrMX1Q= <- is a bad hash. Or you got so lucky that your key made the same collision as

error:keytool error: java.lang.Exception: Alias does not exist

If hash not working:

First, call

C:\Program Files\Java\jdk1.6.0_22\bin\keytool.exe" -exportcert -alias selvin -keystore c:\users\selvin\desktop\selvin.kp

Type password and read the error

If you don't remember your alias keytool error: java.lang.Exception: Alias <selvinn> does not exist I used selvinn to show error.

For a list of all your entries/aliases:

C:\Program Files\Java\jdk1.6.0_22\bin\keytool.exe -list -keystore c:\users\selvin\desktop\selvin.kp

second edit

enter image description here