wtf klaaas, what are you promoting here?
You should be scared for anything online that deal with keys, i like that approach.
The site i pointed at isnt more then a wrapper.
I use it for the puzzle and should not be used as permanent or longtime storage but as a quick way to get access to or create a temporarily wallet.
Google some and you will find
https://bitcore.cc/tsbw/ and
https://github.com/dArkjON/tsbw More brainfood here
https://en.bitcoin.it/wiki/BrainwalletAnything done online isnt safe enough when the terms private key and crypto comes along. I would suggest to generate a wallet offline and keep it offline and use that for safe keeping or next best a hardware wallet. [BTX support soon !]