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What Is MetaMask?

Definition

MetaMask is the most popular crypto wallet for Ethereum and EVM-compatible chains — a browser extension and mobile app for managing ERC-20 tokens, signing transactions, and using dApps.

MetaMask is the recommended wallet for using CoinDevTools on Ethereum and Base. Over 30 million monthly active users make it the most widely adopted EVM wallet.

  • Browser extension — Chrome, Firefox, Brave, Edge, Opera
  • Mobile app — iOS and Android with WalletConnect support
  • Multi-network — supports Ethereum, Base, Polygon, Arbitrum, Optimism, and any custom EVM network
  • Token management — import any ERC-20 by pasting the contract address
  • Transaction approval — review gas fees and approve/reject in a popup
  • Hardware wallet support — connect Ledger or Trezor for maximum security

Using MetaMask with CoinDevTools: 1. Install MetaMask from metamask.io 2. Create a wallet (save your seed phrase) 3. Add the Base network (MetaMask supports it natively via chainlist.org) 4. Fund with ETH (for Ethereum) or bridge ETH to Base 5. Visit CoinDevTools and click "Connect Wallet" 6. Approve the connection and each transaction in MetaMask

Other compatible EVM wallets: Coinbase Wallet, Rainbow, Trust Wallet, Rabby. CoinDevTools works with any wallet supporting WalletConnect or injected provider.

Related Guides

How to Create a TokenHow to Add LiquidityHow to Burn Tokens

Try it yourself

No code required. Connect a wallet and get started in minutes.

Connect MetaMask

Related Terms

Crypto Wallet
A crypto wallet is software that stores your private keys and lets you sign blockchain transactions — the gateway to interacting with DeFi protocols, DEXes, and token creation tools.
ERC-20 Token
ERC-20 is the most widely used token standard on Ethereum and EVM-compatible chains, defining how fungible tokens are created and transferred.
Seed Phrase (Recovery Phrase)
A seed phrase is a 12 or 24-word sequence that serves as the master backup for a crypto wallet — anyone with these words can access all funds in the wallet.
Private Key
A private key is a cryptographic secret that authorizes blockchain transactions — whoever has the private key controls the wallet and all its tokens. Never share it.