MetaMask Guide 2026 — From Installation to DeFi Connection

Key Summary MetaMask is the world's most popular Web3 wallet, used by 30M+ people. Install it as a browser extension or mobile app, store your 12-word seed phrase offline, and connect to EVM-compatible blockchain services including DeFi, NFTs, games, and more. ## What is MetaMask? MetaMask is a non-custodial software wallet for Ethereum and EVM-compatible blockchains. Your private keys are encrypted on your own device, so you control them instead of a third party. | Feature | Details |

1. 1Click "Download" → "Install MetaMask for Chrome"
2. 2In the Chrome Web Store, click "Add to Chrome"
3. 3Pin the MetaMask icon to your browser toolbar ### Mobile App - iOS: App Store → search "MetaMask" → install the app by ConsenSys

• Android: Google Play → "MetaMask – Blockchain Wallet" ## Step 2: Create Wallet and Back Up Seed Phrase 1. Click the MetaMask icon → "Get Started" → "Create a new wallet"

1. 1Set a password (this only unlocks MetaMask on that device and cannot recover your account)
2. 2Your 12-word Secret Recovery Phrase will be displayed ### Seed Phrase Backup — Most Critical Step Do: Write it on paper, make 2 copies, and store them in a fireproof safe. You can also use metal backup cards such as Cryptosteel or Bilodal. Never do: Screenshot it, save it to cloud storage, email it, or share it with anyone — ever. > The seed phrase is the master key. Anyone who has it controls your assets. Lose it and your funds are gone forever. ## Step 3: Add Networks MetaMask uses Ethereum mainnet by default. You can add other chains in two ways: Easy method: Go to chainlist.org, search for your network, and click "Add to MetaMask." Manual method: MetaMask → network dropdown → "Add network" → enter RPC details: | Network | Chain ID | RPC URL | Symbol |

1. 1Paste the token contract address (use CoinGecko or CoinMarketCap, and verify against official sources)
2. 2Confirm the auto-filled symbol and decimals → "Add custom token" → "Import tokens" Sending assets: MetaMask → "Send" → paste the recipient address → enter the amount → review the gas fee → "Confirm". Always send a small test transfer first. ## Step 5: Connect to DeFi ### Uniswap — Token Swaps Visit app.uniswap.org → "Connect wallet" → "MetaMask" → approve the connection → select tokens and swap. ### Aave — Lending and Borrowing Visit app.aave.com → connect your wallet → use the "Supply" tab to deposit assets and earn yield → use the "Borrow" tab to borrow against collateral. Monitor your health factor carefully. ### Curve Finance — Stablecoin Liquidity Visit curve.fi → connect your wallet → choose a liquidity pool → click "Deposit" to provide liquidity and earn fees. > Security rule: Only access DeFi sites through bookmarks. Never use search ad links. Always verify contract addresses before approving transactions. ## Step 6: Hardware Wallet Integration For holdings over ~$5,000 USD, connect a Ledger or Trezor hardware wallet: Ledger steps:
3. 3Connect Ledger via USB, then open the Ethereum app on the device
4. 4MetaMask → account icon → "Connect hardware wallet"
5. 5Select "Ledger" → connect → choose the accounts you want to use Every transaction then requires physical button confirmation on the Ledger, which helps protect funds from phishing attacks. ## Security Checklist | Item | Priority |