How to export MetaMask seed phrase to a new computer? (Migration Guide)

Understanding Seed Phrase Security

1. A MetaMask seed phrase is a 12-word mnemonic that serves as the master key to all accounts and private keys stored in the wallet.

2. It is never transmitted over the internet and must never be entered into any website, application, or service outside of MetaMask’s official interface.

3. Exporting the seed phrase does not involve syncing it through cloud services or MetaMask servers—it remains entirely offline and user-controlled.

4. Any attempt to “upload” or “back up” the phrase via third-party tools introduces irreversible risk of theft or exposure.

5. The phrase itself contains no metadata—only cryptographic entropy—and its value lies solely in its precise order and spelling.

Manual Transfer Process

1. Open MetaMask on the original device and unlock the wallet using your password.

2. Click the account icon in the top-right corner, then select Settings → Security & Privacy.

3. Scroll down and click Show Secret Recovery Phrase, then re-enter your password to confirm.

4. Carefully write down each word in exact sequence on physical paper—do not take screenshots, copy-paste, or store digitally.

5. On the new computer, install MetaMask from https://metamask.io/download and choose Import wallet instead of creating a new one.

Verification Steps After Import

1. Enter the 12-word phrase exactly as written—case-insensitive but order-sensitive—followed by a custom password for the new installation.

2. Confirm the imported account displays the same Ethereum address and token balances visible on the original device.

3. Initiate a small test transaction to a known address and verify receipt on a block explorer like Etherscan.

4. Check connected dApps and previously approved permissions—these are not transferred and must be reauthorized manually.

5. Ensure hardware wallet integrations (if used) remain separate; MetaMask’s seed phrase does not control Ledger or Trezor devices.

Risks of Digital Storage

1. Saving the seed phrase in notes apps, cloud drives, email drafts, or encrypted files creates forensic traces that advanced malware can recover.

2. Browser autofill features may cache the phrase during manual entry, exposing it to extensions with broad permissions.

3. Screenshots—even deleted—leave residual data in memory buffers and temporary file systems accessible to local attackers.

4. USB drives used for transfer can carry firmware-level malware capable of logging keystrokes or intercepting clipboard content.

5. QR code generation tools claiming to “scan and restore” introduce unverifiable cryptographic dependencies and external signing logic.

Frequently Asked Questions

Q: Can I use the same seed phrase on multiple computers simultaneously?Yes. The seed phrase generates deterministic addresses and keys. Running MetaMask on several devices with the same phrase yields identical balances and transaction history—but only if network state is synchronized.

Q: What happens if I mistype one word during import?The wallet will load an entirely different set of addresses with zero balance. MetaMask does not validate partial matches—it treats every 12-word input as cryptographically valid.

Q: Does resetting my MetaMask password affect the seed phrase?No. The password only encrypts the local vault. The seed phrase remains unchanged and fully functional regardless of password resets or UI reinstalls.

Q: Can browser extensions interfere with seed phrase display?Yes. Extensions with access to page content may capture DOM elements during the recovery phrase modal. Disable all non-essential extensions before revealing the phrase.