Ability to have best-practices generated keys

[dogeared]

On of the things I like about java.jsonwebtoken.io is that it generates a key for the HS algorithm variants. And, the key it generates is always a base64 encoded binary byte array that's the max-width the given algorithm supports.

For instance, if you change the algorithm from HS256 to HS512, you'll notice a much longer key is generated.

It'd be nice to have this - as an option at least - for jsonwebtoken.io.

Most examples on the web use secret for the secret which, while human readable, is an anti-pattern that we shouldn't propagate.