How to Bridge Tokens Between Blockchains — Beginner's Guide 2026

Connect your wallet to a bridge app

Go to app.across.to or app.optimism.io/bridge in your browser. Click “Connect Wallet” and select MetaMask (a browser extension that holds your crypto). Make sure your wallet is set to the network where your funds currently sit—Ethereum mainnet if your tokens are there. The most common mistake is trying to bridge from an empty wallet or the wrong network. Across has processed over $36 billion in transfers with zero exploits since launch, according to protocol data.

Select source chain, destination chain, and token

In the “From” dropdown, choose the chain holding your funds—for example, Ethereum. In the “To” dropdown, select your target—like Arbitrum or Polygon. Pick the token you want to move (USDC, ETH, or USDT are cheapest). The interface will show the exact amount you’ll receive after fees before you confirm. On Across, L2-to-L2 transfers average 2 seconds and cost under $1, with many stablecoin moves landing at $0.30–$0.80 total.

Enter the amount and review the quoted fee

Type how much you want to bridge. Look at the “You’ll receive” field—that’s your final amount after all costs. For Ethereum mainnet to Arbitrum transfers, gas fees now average $0.15, with token swaps recently costing as low as $0.04 according to Etherscan data as of January 2026.

If the fee seems high, wait a few hours and try again—gas prices fluctuate constantly. Lower network activity often drops costs significantly for standard transfers.

Confirm the transaction in your wallet

Click “Send” or “Bridge” and approve any token permissions your wallet asks for. A pop-up from MetaMask will show the gas fee—double-check it before clicking “Confirm.” Once confirmed, wait for the transaction to finalize. On deBridge, which uses a 0-TVL model with no pooled liquidity, assets arrive in seconds without wrapped tokens or slippage, supported by over 30 security audits.

Verify your funds arrived and add the destination network to your wallet

Open your wallet and look for the balance. If you don’t see the token, you may need to add the destination network manually. In MetaMask, click the network dropdown, select “Add Network,” and search for the chain you bridged to. Always start with a small test transfer first—over $3 billion in crypto has been sent to wrong addresses permanently, according to blockchain analytics firms.