Hello,
I know that can generate bitcoin address wallet and private key offline. It's true.
I'm interested How can check private key offline?
I created addy 1MyBTCAddy with private key YYYZZZ on bitaddress.org.
I have Private key and want check valid this key or not for with 1MyBTCAddy
Thanks
You can download bitaddress.org from here
https://github.com/pointbiz/bitaddress.org/archive/master.zip and type in your private key in the wallet details tab on a permanently offline computer.