How to Generate a Secure Seed Phrase

Never use online “seed generators” — they can steal your phrase. Only trusted wallets or verified offline tools.

What Is a Seed Phrase and Why It Matters

A seed phrase (mnemonic) is a human-readable version of your private key. It’s 12–24 words from the BIP-39 standard list (2048 words). It allows you to restore access to all your wallets and funds.

If someone gets your seed — they control your money forever. No recovery, no support.

Option 1: Generate in a Trusted Wallet (Recommended)

1. MetaMask (Browser / Mobile)

• Download from metamask.io (official site only)
• Click “Create Wallet”
• Write down 12 words on paper
• Confirm words in order
• Done — seed is generated locally in your browser

2. Trust Wallet (Mobile)

• Download from App Store / Google Play
• “Create a new wallet”
• Copy 12 words to paper
• Verify by re-entering

3. Hardware Wallet (Most Secure)

Seed is generated inside the device and never leaves it.

• Ledger Nano S/X: Follow setup → write 24 words
• Trezor Model T: Connect → create wallet → confirm on screen

Option 2: Offline Generation (Advanced)

For maximum security — generate seed without internet.

Method A: Ian Coleman’s BIP39 Tool (Offline)

1. Go to iancoleman.io/bip39
2. Download the page (right-click → Save As → “Webpage, Complete”)
3. Disable Wi-Fi
4. Open downloaded index.html
5. Generate 24 words → write down
6. Verify checksum (last word must match)

Method B: Dice Roll (True Randomness)

Roll a 6-sided die 99 times → convert to binary → generate seed.

Too complex for most users. Use only if paranoid.

Common Mistakes to Avoid

• Using fake wallet apps from ads
• Typing seed into any website
• Saving seed in notes, email, or cloud
• Skipping word confirmation step
• Using 12 words when 24 are available (on Ledger)

Final Checklist: Did You Do It Right?

• Seed written on paper or metal
• Words in correct order
• Confirmed in wallet
• No digital copies
• Wallet app from official source
• Internet was off (if using offline tool)