Skip to main content

Authorized use only. Use this tool solely on systems, tokens, and assets you own or are explicitly permitted to test — credential extraction, signature forging, and unauthorized access are prohibited by our Acceptable Use Policy.

BIP39 Mnemonic Generator

Loading...

About the Bip39 Generator

BIP39 mnemonic phrases are the human-readable form of cryptocurrency wallet seeds — 12 or 24 words that backup your entire wallet. Generating them securely requires cryptographic randomness that ordinary random functions cannot provide.

This generator uses the browser crypto API to create BIP39 mnemonic phrases locally. Your seed words are never transmitted — they exist only in your browser session. For real funds, always generate on an air-gapped device.

How to use

  1. Choose 12 or 24 words.
  2. Click generate — words appear using cryptographic randomness.
  3. Write down the phrase on paper (never digitally).
  4. Store securely — anyone with these words controls the wallet.

Frequently Asked Questions

Is it safe to generate a seed phrase online? ▾

This generator uses the browser crypto API — words never leave your device. However, for wallets holding real funds, best practice is an air-gapped hardware wallet or offline machine.

What is the difference between 12 and 24 words? ▾

12 words provide 128 bits of entropy, 24 words provide 256 bits. For most users, 12 words is sufficient. Use 24 if you want extra margin.