How It Works & Important Note:

This tool demonstrates the conversion from a valid BIP39 mnemonic phrase to its derived seed and keys. It also allows you to verify the integrity of a phrase using the built-in checksum. You can use the "Generate" function of this calculator to create a valid phrase, as it performs all the necessary cryptographic steps automatically.

⚠️ Crucial Security Note:

While this tool uses the official BIP39 wordlist, you cannot manually create a cryptographically secure mnemonic phrase by picking words at random from the list. A valid BIP39 phrase requires:

1. A source of high cryptographic entropy (secure random numbers).
2. A checksum calculation (using a hash function like SHA-256) to determine the final word.
3. The precise algorithmic process defined by the BIP39 standard.

The phrases generated by this calculator are valid because the final word is automatically derived from a checksum of the preceding ones. However, any phrase assembled manually (e.g., by choosing words you like) will almost certainly be invalid and unusable, as the last word will not match the required checksum. For creating a new wallet, always use the "Generate" function of this tool or other trusted, audited wallet software.