A practical, plain-language guide to protecting your funds and using MetaMask safely on desktop and mobile.
Why security matters
Crypto wallets are the gateway to your digital assets. Unlike traditional banks, custody is yours — which means the responsibility for safe storage, secure access, and cautious interaction with dapps rests with you. A single lost seed phrase or compromised private key can permanently expose funds. This guide focuses on practical steps to reduce risk when using MetaMask.
Install and verify
Only install MetaMask from the official source: the Chrome Web Store, Firefox Add-ons, or the official metamask.io website. Verify the publisher and user reviews before installation.
Double-check the extension ID if you’re re-installing — impostor extensions mimic names. When in doubt, remove and reinstall from the official site.
Keep MetaMask and your browser up to date. Security patches are released frequently and patch critical vulnerabilities.
Create a strong wallet
When creating a new MetaMask account, write down the seed phrase on paper. Do not store the seed phrase in cloud notes, screenshots, or copies on your phone.
Consider using a hardware wallet (e.g., Ledger, Trezor) that integrates with MetaMask for large balances. Hardware wallets keep private keys offline, which is the safest option for custody.
Use a unique account for high-value holdings and smaller "hot" accounts for everyday interaction. This limits exposure if one account is compromised.
Operational security (OpSec) best practices
Never share your seed phrase or private key. MetaMask support will never ask for it.
Use a strong, unique password for your MetaMask vault and enable OS-level protections (biometrics or strong passcodes on mobile).
Enable browser-level security features: block third-party cookies, enable site isolation, and avoid installing untrusted extensions that request wide permissions.
Beware of phishing: verify URLs, avoid clicking unknown links, and never paste your seed phrase into websites. Scammers commonly create fake dapps that prompt seed input.
When connecting to dapps
Review requested permissions carefully. MetaMask shows which accounts and permissions a site requests — deny requests that seem excessive.
Use the "Connected sites" list to remove access after you finish using a dapp.
For token approvals, prefer setting a single-use or limited allowance rather than infinite approvals. Revoke permissions periodically using on-chain tools or token allowance managers.
Backups and recovery
Store backups in multiple secure physical locations. Paper and metal seed backups survive different failure modes (water/fire).
Test your recovery phrase on a spare device before relying on it. Practicing restores helps you avoid mistakes during a real recovery.
Disclaimer — Read carefully
This guide provides general information about using MetaMask and improving security. It does not constitute financial, legal, or professional advice. You use MetaMask and related services at your own risk. Always verify official sources before making decisions. The author and publisher are not liable for losses resulting from following (or failing to follow) any advice in this document. For support with MetaMask specifically, consult the official MetaMask website and support channels.