-snip- or i will add it to blockchain.com and get it back, or can someone give me advice , is it ready to use?.
-snip-
Blockchain.com and most wallets now only supports "
WIF Private key" so if you're planning to use it, you must encode it first using the tools you've mentioned.
Take note of the security implications stated above.
Talking about safety, it's better if you can import the WIF PrvKey to an "
Air-gap" PC instead since it looks like a lot of
Bitcoins from 2014.
You can check the balance and spend from it using an online computer installed with the watch-only version of the offline wallet.
You can get the address from the restored wallet in the air-gap pc.
Electrum has such feature:
https://bitcoinelectrum.com/how-to-spend-from-an-offline-paper-wallet-using-electrum/ | Electrum WebsiteYou can also do the private key conversion in the air-gap PC where it's safe from hackers, viruses and malware.
Just download the source of bitaddress, other paper wallet tool or code, then transfer it to that PC.
Wikipedia:
Air-Gap (networking)