STOP
DO NOT enter your Bitcoin private keys to any type of website, ever.
STOP
You can say that again because Segwit is not implemented for Bitcoin and has been dropped but
it is confusing because I hear about Segwit wallets and I am not talking about Segwit2x here that uses B2X
Segwit proposal would had lead to bigger block sizes but they tried to redefine how they count bytes
to hide this for some reason which i really don't like
See
https://www.youtube.com/watch?v=DzBAG2Jp4bg