bcryptr is an extremely simple tool to generate bcrypt hashes on the command line.
go install github.com/bigwhoop/bcryptr
bcryptr [-c COST] PASSWORD
$ bcryptr somepassword
$2a$10$cW0P/yg1CKkky0QXBbmEnubzxVT8YS39JmBZ8CeEfQ4Sk5GXCe6im
$ bcryptr -c 14 somepassword
$2a$14$oS5E7WxSQF9xNo2CKAiA6e52SQPKo83WKJUt/ZgygJ2gBHxuV5r.6