Hello. I want to know about any bitcoin offline wallet which includes no third party. And can that wallet be hacked if I don't input any kind of malicious file or connect the device to Internet?
Easy way is download electrum wallet, then cut off your internet, generated address, write down you electrum seed in paper and keep it safe place.
what next you can do publish your address only.
You can buy hardware wallet but you will still need to move your coins into the hardware wallet which requires internet connection, or find Bitcoin paper wallet, they are more secured than others, you will have to safeguard your recovery seed though
my assume HammadAli haven't bitcoin yet, so don't need to move his bitcoin. as I know paper wallet recovery private key only, not seed.
I suggest to us the Trezor, it can store so many cryptocurrencies compared to other wallets.
Ledger wallet has multi cryptocurrency too.