Table of contents
Quick overview
This guide shows how to open a new MetaMask wallet, add accounts, and manage the resulting addresses safely. You’ll get step-by-step instructions for both the browser extension and the mobile app, plus a checklist for backups and everyday DeFi use. I’ve been using MetaMask daily for months for small swaps and dApp testing (and I’ve made mistakes — I’ll call those out). The goal here is practical: set up, secure, and start using a hot wallet without false promises.
What you should know before you open a new MetaMask wallet
- Terminology: a MetaMask "wallet" is the vault controlled by one seed phrase (recovery phrase). An "account" is an address derived from that seed phrase. Want a brand-new, independent wallet? You need a separate seed phrase.
- Risk profile: MetaMask is a non-custodial hot wallet — convenient for DeFi and swaps, but not a substitute for hardware wallets if you hold large sums. Put everyday funds here; keep bulk savings offline.
- Device choice: Most people use phone for quick swaps and browser extension for complex dApp interactions. Which suits you depends on how you interact with DeFi (more on that later).
If you haven’t installed MetaMask yet, start with the extension or mobile installer: install-extension | install-mobile.
Step-by-step: create a new MetaMask wallet (extension & mobile)
Below are practical, current steps that match the wallet flows I use. Follow them slowly and don’t skip the seed phrase backup.
Create a new MetaMask wallet — browser extension
- Install the extension for your browser (install-extension).
- Click the fox icon (or extension icon) and choose "Get Started" → "Create a Wallet."
- Set a strong local password (this encrypts the vault on your device).
- MetaMask will show a 12-word seed phrase (recovery phrase). Click to reveal, then write it down on paper. Do not photograph, screenshot, or upload it.
- Confirm the phrase when asked (MetaMask typically requires you to re-order or select words).
- Your first account (Account 1) is created. Click the account name to copy the new MetaMask wallet address.
And yes, copy-paste happens — but always verify addresses character-by-character when sending large sums.
Create a new MetaMask wallet — mobile app
- Install MetaMask on iOS/Android (install-mobile).
- Open the app and choose "Create a new wallet." Accept or decline analytics (your choice).
- Create a secure passcode; enable biometrics if you want quick unlock.
- Back up the 12-word seed phrase offline and confirm it in-app.
- The app creates your first account and offers an in-app dApp browser (useful for mobile-only dApps).
If you prefer not to use the app’s dApp browser, you can connect to mobile apps via WalletConnect instead (walletconnect-and-mobile-browser).
Create additional accounts vs a brand-new wallet
- Add accounts: In MetaMask, click the account avatar and choose "Create Account." That yields a new metamask account (a fresh address) derived from the same seed phrase. Good for separating funds or tracking budgets.
- Import accounts: Use "Import Account" to add an address via private key or JSON file if you control another key pair (import-and-recovery).
- Truly independent wallet: If you want a different seed phrase (a separate vault), create a new browser profile or setup a separate mobile instance. Creating another account inside the same seed does NOT give you an independent wallet.
For watch-only workflows and managing multiple addresses, see multiple-accounts-watch-only.
Managing addresses, private keys, and exports
- Copy address: Click account name → "Copy to clipboard." Always paste into the send field and visually confirm the pasted address.
- Export private key: Account details → Export Private Key (you’ll need your MetaMask password). Keep any exported private key offline and never paste it into unknown sites.
- Rename accounts: Use Account Details → Edit to give each address a friendly label.
If you need to import/export or move keys between wallets, follow the secure steps in import-export-keys.
Post-setup checklist (what to do immediately)
Security risks and common mistakes I've seen
- Token approvals: Avoid unlimited token allowances. Grant only the amount you need, and use tools to revoke approvals regularly (revoke-approvals).
- Phishing: Never paste your seed phrase into a website. MetaMask will never ask for your seed phrase to connect to a dApp. If it does (or an email asks you), it’s phishing. See phishing-scams-and-email-frauds.
- Wrong network sends: Sending tokens to an address on the wrong blockchain is a common recovery headache. Double-check network and token standards before sending.
I once approved a malicious contract while rushing through a UX flow. It cost time and a revoke. Don’t rush approvals.
Practical tips for daily DeFi use
- Test with small amounts before large swaps or deposits. Why risk more than you need to? (It helps catch chain-mixing errors.)
- Use MetaMask’s built-in swap for quick trades; compare quotes and slippage settings before confirming (built-in-swap).
- For desktop dApps use the injected provider; on mobile use the in-app browser or WalletConnect to connect (connect-to-dapps | walletconnect-and-mobile-browser).
- Manage gas fees: check the EIP-1559 fields (Max Priority Fee / Max Fee) and use L2s when possible to save gas (gas-fees-and-eip-1559).
Table: Extension vs Mobile (quick comparison)
| Feature |
Browser extension |
Mobile app |
| In-app dApp browser |
No (uses injected provider) |
Yes (built-in browser) |
| WalletConnect support |
Yes |
Yes |
| Biometric unlock |
Depends on OS |
Yes (standard) |
| Hardware wallet connect |
Yes (Ledger/Trezor) |
Yes (via USB/Bluetooth or companion app) |
| Quick swaps |
Yes |
Yes |
Who this is for — and who should look elsewhere
Who this is for
- People who actively use DeFi, swaps, and dApps and want a flexible non-custodial hot wallet.
- Users who need multi-chain EVM-compatible access (Ethereum and compatible L2s/chains).
Who should look elsewhere
- If you need Solana or non-EVM chains as primary use, consider a wallet focused on those ecosystems (solana-tron-near).
- If you store very large holdings, combine MetaMask with a hardware wallet or use hardware-only for cold storage (hardware-best-practices).
FAQ
Q: Is it safe to keep crypto in a hot wallet?
A: Hot wallets are fine for daily activity and small balances. For large holdings, use a hardware wallet or multi-sig. Think of MetaMask as your day-to-day wallet, not your vault.
Q: How do I revoke token approvals?
A: Use a revocation tool or explorer UI to view allowances and revoke them. See revoke-approvals for step-by-step options.
Q: What happens if I lose my phone?
A: You can restore the same wallet on a new device using your seed phrase — only if you backed it up. If you didn’t, recovery isn’t possible. See restore-wallet and backup-and-recovery-options.
Q: How do I open a new MetaMask account or get a new MetaMask wallet address?
A: Use "Create Account" inside MetaMask for a new address derived from your seed. To get an independent seed (a brand-new wallet), create a separate browser profile or mobile install.
Final notes and next steps
Create the new MetaMask wallet slowly. Back up the seed phrase in multiple physical places, lock your phone, and connect a hardware wallet for any funds you can’t afford to lose. If you want guided setup for desktop or mobile, follow the step guides: setup-desktop | setup-mobile. Ready to start? Create the vault, write the seed phrase, and make your first small test transaction.