BIP39 Passphrase Generator
Generate mnemonic seed phrases
How to Use
1
Choose word count
Select 12, 15, 18, 21, or 24 words.
2
Generate
Click Generate to create a random mnemonic phrase.
3
Write down securely
Record the phrase on paper - never digitally.
4
Verify
Optionally verify an existing phrase is valid.
Frequently Asked Questions
What is BIP39?
BIP39 is a standard for generating cryptocurrency wallet seed phrases using a list of 2048 words.
How many words should I generate?
12 words is common, 24 words provides maximum security. More words = more entropy = harder to crack.
Is my seed phrase private?
Yes, generation happens entirely in your browser using the Web Crypto API. Never share your seed phrase.