And all Public Keys start with 1, I feel there is some kind of conspiracy.
/end of sarcasm
I guess you meant addresses ?
Note that a public key is not the same as an address. The public key is being hashed to retrieve the address (sha256 and ripemd160 + checksum).
@OP:
Regardless of the initial statement:
Do not use any website to create a paper wallet. Not even after downloading and running it offline.The
usability is not worth the risk.
Why you dont recommend it?
Trails!
It is very easy for websites to log your generated keys with Javacript if you are connected to internet. Moreover, even if you download the webpage and try generating paper wallet in offline mode, there are still many risks. Website may keep the trail of your address in browser and when you are once again connected to internet, such trails may be extracted via cross-website cookies. One more risk is of wireless printer. Suppose you generated paper wallet in offline mode and printed it via wireless printer. In such case, printer's records will have trail of your paper wallet and it is easy to retrieve that by hacking your printer.
This information is as per my knowledge. Bob123 may have other reasons to discourage using websites for wallet generation.