MetaMask Extension — Getting Started with MetaMask

What is MetaMask?

MetaMask is a popular, non-custodial Web3 wallet and browser extension that lets you manage Ethereum and EVM-compatible assets, sign transactions, and connect to decentralized applications. The extension gives you a convenient interface while private keys remain under your control.

Before you begin

• Use a modern browser—Chrome, Firefox, Brave, or Edge—and keep it updated.
• Only download the MetaMask extension from the official source: metamask.io or your browser’s official extension/add-ons store (verify publisher is MetaMask).
• Prepare a private, offline place to record your Secret Recovery Phrase (SRP). Prefer pen & secure paper or a metal backup for long-term durability.
• Decide whether you'll pair MetaMask with a hardware wallet for large balances — recommended for enhanced security.

Install the MetaMask extension

1. Visit the official site: go to metamask.io and click "Download".
2. Choose your browser: click the correct browser link and install the extension from that browser’s official store.
3. Add the extension: follow the browser prompts to add MetaMask. After installation, pin the extension for easy access.

Create a new wallet (initial setup)

1. Open the MetaMask extension and choose “Get Started” → “Create a Wallet”.
2. Set a strong extension password used to unlock the extension on your device. This password encrypts local data — it does not replace the Secret Recovery Phrase.
3. MetaMask will generate a Secret Recovery Phrase (SRP). Write down the words EXACTLY in order and store them offline. Confirm the phrase in the app when prompted.

Connecting to dApps and approving transactions

When a dApp asks to connect, MetaMask will show a connection prompt. Approve only trusted dApps and review requested permissions.

• Always verify the domain of the dApp and its credibility before connecting.
• When signing transactions, check the recipient address, network, and gas/fees on the MetaMask confirmation screen — this is the device’s last opportunity to catch malicious requests.
• For token approvals, prefer limited approvals or use third-party tools to audit existing allowances periodically.

Networks, tokens, and adding custom RPCs

MetaMask defaults to the Ethereum mainnet but supports many EVM-compatible networks. To add a custom network (e.g., Polygon, BNB Smart Chain), use the “Add network” option and input the RPC details from the official network provider.

• Only use RPC endpoints from official or reputable sources.
• Add tokens manually by contract address when they don’t auto-appear; verify contract addresses from project websites or explorers.

Using MetaMask with a hardware wallet

For increased security, pair MetaMask with a hardware wallet (Ledger, Trezor). The private keys remain on the hardware device while MetaMask acts as a convenient UI for viewing balances and preparing transactions to be signed on the hardware device.

Security best practices

1. Backup SRP offline: use durable media; consider metal backup for long-term protection.
2. Use a unique password and password manager: do not reuse passwords between services.
3. Avoid phishing: only connect to known sites and never enter your SRP into webpages or forms.
4. Limit approvals: revoke unnecessary token approvals with on-chain allowance managers when appropriate.
5. Keep browser and OS updated: security patches reduce exposure to exploits.

Troubleshooting common issues

• Extension not visible: pin MetaMask in the browser’s extensions menu or restart the browser.
• Balances missing: confirm the correct network is selected and add the token via its contract address if needed.
• Locked out: restore your wallet by choosing "Import using Secret Recovery Phrase" and entering the exact words in order on a fresh MetaMask install.

FAQs — quick answers