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Drop-in MetaMask replacement with air-gapped QR signing - works with any dApp. Keys never touch this device. Locker Protocol Wallet — the air-gapped web3 wallet Locker Protocol Wallet is a free, open-source, drop-in MetaMask replacement where your private keys never touch your browser. Signing happens on a separate, offline device (the Locker Vault) and travels back as a QR code — so a compromised browser, a malicious dApp, or a phishing site has nothing to steal. Every transaction is checked by an AI security layer that runs entirely on your device, in the extension and inside the offline Vault itself. Why Locker is different Your keys stay air-gapped. No seed phrase, no private key, and no password that can derive one ever lives in this extension. It is watch-only by design. AI risk analysis, on your device. Before anything reaches your Vault, each request is analyzed locally in milliseconds. Zero cloud, zero telemetry: unlike security tools that upload your transactions to their servers, nothing about what you sign ever leaves your device. Works on any dApp. Exposes the standard window.ethereum provider, so swaps, bridges, lending and NFT marketplaces see it exactly like MetaMask. Connect, sign by QR, done. QR in, QR out. The extension builds the transaction, your offline Vault reviews and signs it, and you scan the signature back. Nothing sensitive crosses the gap. Multi-chain EVM. Works on any EVM-compatible network — the networks you already use today, plus any custom network you add yourself. No account, no tracking. No sign-up, no telemetry, no analytics, no data collection. Three layers of protection, all local 1. Deterministic rules block the dangerous shapes: unlimited spending approvals, collection-wide operator grants, tokens with no contract code, phishing origins, account delegations. These, and only these, can require an explicit acknowledgement before the QR is even shown to your Vault. 2. A local AI model, built on known drainer patterns, scores every request and flags the unusual combinations no single rule covers — such as most of your balance leaving for an address you have never used. 3. The offline Vault re-checks everything. The QR carries no verdict: your Vault re-reads the raw request and runs the same analysis independently. A compromised computer cannot hide a warning from the screen that has the last word. The AI is advisory by design. It can raise a warning, never lower one, and it never blocks a signature: what you are allowed to sign is decided by rules you can read in the source code. Day to day Your tokens appear automatically, with your total portfolio value in USD — no "Add token" step for the assets people actually hold. Human-readable transactions. Approvals, transfers and typed data are decoded and explained in plain language, in 16 languages, on both the extension and the Vault. Verifiable by anyone. The entire wallet is free software, and our published packages are reproducible: you can rebuild them yourself and check they match the code, byte for byte. How it works 1. Install the free Locker Vault on a dedicated offline device (an old phone works). 2. Import your public addresses into the extension by QR. 3. Use any dApp normally — when it is time to sign, scan the request into the Vault and scan the signature back. Your keys stay offline, forever.