Crypto
BIP39 Passphrase Generator
Generate an English BIP39 mnemonic to test word-count handling and recovery-phrase interfaces. A mnemonic is separate from an optional BIP39 passphrase.
About this tool
When to use it
Generate an English BIP39 mnemonic to test word-count handling and recovery-phrase interfaces. A mnemonic is separate from an optional BIP39 passphrase.
How to use it
Choose 12, 15, 18, 21, or 24 words, generate a mnemonic, and inspect the word count. Use disposable test data for interface experiments. Follow the wallet's trusted setup and backup process for actual funds.
Guide updated . Examples checked against this implementation.
Worked examples
A twelve-word test sequence
Input
Mnemonic words: 12Expected output
12 English BIP39 words with a valid checksum; newly generated each timeThis describes the generated structure rather than publishing a reusable recovery phrase. The tool does not derive or display an account address.
Errors and unsupported input
A wallet asks for an additional passphraseThat is separate from the mnemonic word sequence. This page generates the mnemonic only; confirm the wallet's expected recovery workflow.
Continue this workflow
- Token Generator: Generate generic test tokens when wallet recovery semantics are unnecessary.
Format references
Questions
Frequently asked questions
Is the page title's passphrase the optional BIP39 password?
No. The output is a mnemonic word sequence. An optional BIP39 passphrase is a separate value used by compatible wallets during seed derivation.