How to Set Up MetaMask: Complete Beginner Guide

MetaMask is the wallet most people meet first, because almost every Ethereum application expects it. Installing it takes about three minutes. Understanding what you have just taken responsibility for takes a little longer, and that part is where money gets lost.

This guide covers the install, the recovery phrase, adding networks, your first transaction, and the specific mistakes that catch beginners.

What MetaMask actually is

MetaMask is a self-custodial wallet. It holds the keys to your accounts, and it does not hold your coins. Your coins sit on a blockchain; the wallet is the thing that proves they are yours and lets you move them.

Self-custodial means there is no support desk that can reset your password, reverse a transaction, or recover an account. That is the trade: you get full control, and full control means the mistakes are yours to keep. Nobody is coming to fix them.

Which chains it covers

MetaMask works with Ethereum and EVM-compatible networks: Polygon, BNB Chain, Arbitrum, Optimism, Base and dozens of others. It does not hold Bitcoin, and it does not hold Solana without a separate arrangement. If those are what you own, this is the wrong wallet.

Installing it

Only ever download from metamask.io. Fake MetaMask extensions and apps appear constantly, they look correct, and they exist to capture your recovery phrase. A search result is not a source; type the address or use a link you trust.

Browser extension

• Go to metamask.io and choose your browser
• Install the extension and pin it to your toolbar, so you can tell the real one from a fake popup
• Open it and choose to create a new wallet
• Set a password — this unlocks the extension on this device only, and is not your recovery phrase

Mobile app

The app is on the App Store and Google Play under Consensys. Check the publisher name, not just the icon. The setup flow matches the extension, and you can sync the two later if you want the same accounts on both.

The recovery phrase

MetaMask will show you twelve words. Those words are your wallet. Anyone holding them controls your funds from anywhere in the world, and no password, PIN or biometric stands in their way.

This is the part to slow down on.

How to store it

• Write it on paper. Two copies, two locations.
• Never photograph it. A photo goes into cloud backup automatically, which puts your wallet on a server you do not control.
• Never type it anywhere except the MetaMask unlock screen. Not into a password manager note, not into a chat, not into a website.
• Never share it. Support staff never ask for it. Anyone who does is stealing from you, without exception.

Why the format matters

Those twelve words are a standard, so they can restore your wallet in MetaMask or in most other wallets. Convenient, and also the reason a leaked phrase is unrecoverable: the thief does not need your device or your password, only the words.

MetaMask asks you to re-enter the phrase to confirm you wrote it down. Do the exercise properly. People skip it, lose the paper months later, and discover the problem at the worst possible moment.

Adding networks

MetaMask starts on Ethereum Mainnet. Other chains have to be added, and sending funds to the right address on the wrong network is one of the most common ways to lose them.

The safe way

Use chainlist.org, connect your wallet, and add networks from there. It fills in the RPC details for you and avoids the typo-in-a-config-field problem.

Adding manually needs five fields: network name, RPC URL, chain ID, currency symbol and block explorer. Take them from the chain's official documentation. A malicious RPC endpoint can show you fabricated balances and route your transactions somewhere you did not intend.

Gas on each chain

Every network charges fees in its own token: ETH on Ethereum and its layer twos, BNB on BNB Chain, POL on Polygon. Arriving on a new chain with tokens but no gas is a common dead end — you hold value you cannot move until you bridge or buy a small amount of the native token.

Your first transaction

Send a small test amount first. Every time, to every new address. The fee on a test send is trivial next to the cost of discovering a mistake with your full balance.

• Check the network matches on both ends, sender and receiver
• Check the first and last four characters of the address — clipboard-hijacking malware swaps addresses, and the middle looks plausible
• Read the fee before confirming; Ethereum mainnet fees swing widely through the day
• Wait for confirmation before sending the rest

Reading a confirmation screen

MetaMask shows what a transaction will do before you sign. Read it. When a site asks for a token approval, it is asking for permission to move that token on your behalf, sometimes without a limit. Unlimited approvals are normal in DeFi and they are also how drained wallets usually get drained: the permission outlives your visit.

Mistakes that cost people money

Fake support

Post a question in any crypto forum and helpful strangers will arrive within minutes. Some will send you to a "wallet validation" page. That page wants your recovery phrase. MetaMask has no validation process, and no legitimate support conversation ever needs those words.

Approvals left open

Approvals granted to a site months ago are still live today. Review them periodically in Settings, or through revoke.cash, and remove the ones you no longer use.

One account for everything

MetaMask makes multiple accounts from the same recovery phrase. Use a separate one for connecting to new or unfamiliar applications and keep long-term holdings on an account that never touches them. It costs nothing and limits the blast radius.

Assuming the extension icon is real

Malicious sites open popups styled to look exactly like MetaMask. The genuine extension opens from the browser toolbar, in its own window, and cannot be rendered inside a web page. If a MetaMask prompt appears inside the page, close it.

When a hardware wallet makes sense

MetaMask connects to Ledger and Trezor, which moves your keys onto a device that signs transactions offline. You keep the same interface and the same applications; the keys stop living on an internet-connected computer.

The rough threshold most people settle on: once the balance is more than you would be relaxed about losing to a bad click, the hardware wallet costs less than the risk. See our wallet rankings for how the hardware options compare.

Next steps

With MetaMask installed and the phrase stored properly, the wallet is no longer the risky part — your decisions are. Our guides on risk management and trading for beginners cover what comes next.

MetaMask rates 9/10 in our crypto wallet rankings, scoring highest for DeFi support and lowest for multi-chain coverage, since it stays within EVM networks.