A key generator tool by iancolemanarrow-up-right can generate EIP2333 keys from a BIP39 mnemonic, or a seed, or a master secret key.
This tool should be used offline and is useful for extracting withdrawal keys and signing keys.
Link: https://iancoleman.io/eip2333/arrow-up-right
For more info see the EIP2333 specarrow-up-right.
Last updated 3 years ago