Get the extension Across with Locker Protocol Wallet
Across is a bridge for moving assets between Ethereum and its layer 2 networks.
Use Across with a wallet whose private key never touches your computer: the site connects to the extension, and every signature is approved on a separate offline device.
Checked against the live site on 2026-09-17
We run the extension against the real Across site, not a copy of it. On 2026-09-17, all five checks passed:
- 1Across lists the wallet in its connect menu, under "Locker Protocol Wallet".
- 2Refusing the connection leaves Across idle and grants it nothing.
- 3Approving it walks every window and signature Across asks for and reaches the working app.
- 4Reloading the page keeps the session without asking for a new approval.
- 5Disconnecting Across from the wallet's list of connected sites makes the page let go.
How to connect Across
Install the extension and the Vault
Add Locker Protocol Wallet to Chrome or Brave, and set up the free Locker Vault on a spare phone that stays offline.
Choose "Locker Protocol Wallet"
Open Across, press its connect button and pick "Locker Protocol Wallet" in the list, then approve the connection in the extension.
Sign on the offline device
When Across asks for a signature, the extension shows a QR code. Scan it with the Vault, read the transaction there, approve it, and scan the answer back.
On EVM, the Vault decodes the call before you sign it: what it does, which token, and who it lets spend.
Across and Locker: questions people ask
Is it safe to use Across with Locker Protocol Wallet?
The wallet cannot make any site safe, but it changes what an attacker can do: the key never touches the computer, every transaction is shown on the offline device before you approve it, and risky approvals and known phishing sites are flagged first.
Which button do I pick on Across?
"Locker Protocol Wallet". That is the entry Across showed for the wallet when we checked it on 2026-09-17. Sites change their menus, so if it has moved, look for Locker Protocol Wallet or the generic browser wallet entry.
Do I need a hardware wallet to use Across this way?
No. The key lives on the Locker Vault, a free app you install on a spare phone and keep offline. Transactions travel to it and back as QR codes, with no cable and no Bluetooth.
Does Locker Protocol Wallet add a fee on Across?
No. Using Across through the wallet costs only what Across and the network charge. The wallet's own fee applies to swaps and bridges made from the extension itself (at most 0.25%), shown before you sign.
Other dApps checked on the same chain
Related terms
Across is a third-party site, not affiliated with Locker Protocol. Compatibility was measured on 2026-09-17; sites change, and if something no longer works, tell us.