MetaMask Security Settings Every User Should Enable

MetaMask includes several built-in security settings and behaviors that meaningfully reduce risk beyond the basics covered in a standard setup, but many are not obvious or are easy to overlook if you've never gone looking for them. Reviewing and configuring these deliberately closes off several common attack paths that affect careless users far more than careful ones.

Enable phishing and malicious site detection

MetaMask maintains and checks against a list of known phishing domains, warning you before you interact with a flagged site. Make sure this feature (sometimes labeled security alerts or similar in settings, depending on version) is enabled — it's not a complete defense since new phishing sites appear constantly, but it catches a meaningful share of known bad actors before you connect a wallet to them.

Review and revoke token approvals regularly

Every time you approve a token for use with a dApp — swapping, lending, or providing liquidity — you're granting that contract permission to spend some or all of a given token from your wallet. Many interfaces default to unlimited approval amounts rather than the specific amount you're transacting. Periodically reviewing active approvals and revoking ones you no longer need (through MetaMask's own interface or a dedicated approval-checking tool) limits how much a compromised or malicious contract could ever take, even long after you last used it.

Set custom approval amounts where possible

When a dApp requests a token approval, check whether the interface lets you edit the requested amount before confirming, rather than accepting a default unlimited approval. Limiting the approval to what you actually intend to transact meaningfully reduces the damage if that specific contract is later found to be malicious or gets exploited.

Understand the connected sites list

MetaMask's settings show every site your wallet is currently connected to. Review this list periodically and disconnect sites you no longer use — an old, forgotten connection to a site that later turns malicious (through a hack of the site itself, for instance) is unnecessary lingering exposure.

Be deliberate about network configuration

Only add custom networks using RPC details from official, verified sources — a project's own documentation or a reputable chain data page — never from a random link in a chat or comment. A malicious RPC endpoint can misreport balances or transaction details to your wallet, a risk covered further in our explainer on man-in-the-middle attacks in crypto.

Read every signature request, not just transactions

MetaMask distinguishes between standard transactions and signature requests, and increasingly supports readable structured data via EIP-712. Take the extra few seconds to read what a signature request actually says before approving — many wallet-draining incidents happen because a victim clicked through a signature prompt without reading the (readable) details in front of them.

Consider hardware wallet pairing for larger balances

MetaMask can act purely as an interface while a paired hardware wallet holds the actual private key and performs signing. This combines MetaMask's broad dApp compatibility with a hardware device's offline key protection — a meaningful upgrade once your holdings grow beyond what you'd be comfortable losing to a software-only compromise.

Use a strong, unique extension password and lock timeout

MetaMask's local password protects the extension itself from casual access on a shared or unlocked computer, separate from your seed phrase's protection of the underlying funds. Use a genuinely unique, strong password rather than reusing one from another account, and pay attention to the auto-lock timeout setting, which locks the extension after a period of inactivity — a short timeout is a minor daily inconvenience but meaningfully reduces the window during which someone with brief physical access to an unlocked computer could interact with an already-unlocked wallet.

Double-check before every network switch

If you regularly interact with multiple networks, get in the habit of glancing at which network MetaMask is currently set to before confirming a transaction, particularly before sending funds. Sending an asset intended for one network while MetaMask is actually set to a different one is a common, avoidable mistake, and depending on the specific chains involved, it can sometimes result in funds becoming difficult or impossible to recover.

Quick settings checklist

Setting/habit	What it protects against
Phishing/malicious site detection enabled	Known phishing domains
Regular approval review and revocation	Old, forgotten, or malicious contract permissions
Custom (non-unlimited) approval amounts	Scale of damage from a single compromised contract
Periodic connected-sites review	Lingering exposure to unused connections
Verified RPC/network sources only	Malicious or misreporting RPC endpoints
Reading every signature request	Malicious or unexpected authorization
Hardware wallet pairing	Key exposure to malware on your computer

Bottom line

MetaMask's default settings provide a reasonable baseline, but the meaningful security gains come from actively reviewing approvals, limiting their scope, verifying network sources, and actually reading every signature request rather than clicking through automatically. Combined with a paired hardware wallet for larger balances, these habits close off most of the common paths that lead to wallet compromise — see our broader guide to safely connecting your wallet to a dApp for the habits to apply every time you use a new site.