hey everyone i have a seed and i want to transform my seed in wallet.dat file and import it in my node, any idea which tools allow me to change my seed word into wallet.dat please?
You can't,
but in another way, you can import your seed first to Electrum (tick BIP39 Option) or another wallet support and get the private key,
After you got the private key, then in the Bitcoin core wallet, go to console type:
importprivkey , that automatically will save in wallet.dat
Don't forget to specify in what address you want to run in the node by the specific private key.