How to Bridge ETH to Layer 2 for Free

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Ethereum mainnet is secure and battle-tested, but expensive for everyday use. Gas fees during peak activity can make routine DeFi interactions impractical. Layer 2 networks solve this by processing transactions off the main chain and settling them back to Ethereum, giving you the same asset at a fraction of the cost.

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Bridging ETH to a Layer 2 is how you get there. Most wallets charge an extra fee to do it. Backpack Wallet does not.

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Why Bridge ETH to Layer 2?

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Layer 2 networks are built on top of Ethereum to reduce costs and increase speed without sacrificing security. The most widely used Ethereum L2s are Base, Arbitrum, Optimism, and Polygon.

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Bridging ETH to these networks gives you four main advantages:

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Lower fees. Gas costs on L2 networks are typically 10 to 100 times cheaper than Ethereum mainnet. Actions that cost $20 on mainnet often cost cents on Base or Arbitrum.

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Access to DeFi. Many of the most active lending markets, DEXs, and yield protocols operate primarily on L2s. Bridging ETH is the entry point to these ecosystems.

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Faster execution. L2 transactions confirm in seconds. Mainnet block times and congestion delays are largely eliminated.

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Same asset. When you bridge ETH to an L2, you still hold ETH. Your exposure does not change. You are simply moving it to a cheaper and faster network.

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What Bridging ETH to L2 Actually Costs

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When you bridge ETH through a wallet, three separate costs apply:

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Network gas fee. Paid to Ethereum to process your transaction on the source chain. Unavoidable and varies with congestion.

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Bridge protocol fee. Charged by the underlying bridge protocol for facilitating the cross-chain transfer. Varies by route and provider.

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Wallet-level fee. Charged by the wallet app itself on top of the bridge quote. Most wallets charge between 0.25% and 0.875% of the transaction value. This is usually embedded in the rate you see, making it invisible unless you know to look for it.

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The first two costs are inherent to bridging. The third is not. It exists because most wallets charge it.

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For a user bridging $2,000 of ETH to Base, a 0.875% wallet fee is $17.50 per transaction. Bridge weekly and that is over $900 per year paid to the wallet alone, before gas or protocol costs.

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Which L2 Networks Can You Bridge ETH To for Free?

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Backpack Wallet charges zero wallet-level fees on bridges across all supported networks. 

Supported Ethereum Layer 2 networks include:

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• Base
  
  
• Arbitrum
  
  
• Optimism
  
  
• Polygon
  
  

Beyond these L2s, Backpack supports bridging across 14+ networks in total, spanning both EVM and non-EVM ecosystems including Solana, Sui, BNB Chain, Monad, and more.

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Zero fees apply across all supported networks with no minimum bridge amount and no promotional conditions. This is Backpack's standard fee structure.

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How to Bridge ETH to Layer 2 for Free Using Backpack Wallet

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Step 1: Download Backpack Wallet. Install Backpack Wallet on iOS or Android from backpack.app. Set up your wallet and fund it with ETH on Ethereum mainnet.

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Step 2: Tap the Swap button. On the home screen, tap the Swap button at the bottom of the app.

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Step 3: Switch to the Bridge tab. At the top of the Swap screen, you will see two tabs: Swap and Bridge. Tap Bridge to switch to the bridging interface.

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Step 4: Select your asset and amount. Choose your asset and enter the amount you want to bridge. Backpack will show you available routes with estimated receive amounts, price impact, and transfer time. Select the route that fits your needs: Cheapest for the best rate, or Fastest for the quickest transfer.

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Step 5: Select your destination wallet. Choose the wallet you want to receive the bridged assets. Backpack displays your available wallets directly in the interface.

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Step 6: Confirm the transaction. Review the quote. Backpack Fee is displayed as 0% directly in the interface before you confirm. There is no wallet markup added to the quote. Confirm to execute the bridge.

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One thing to note: you will need ETH on Ethereum mainnet to cover the source chain gas fee. This applies regardless of which wallet you use.

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Conclusion

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Bridging ETH to Layer 2 is one of the most practical ways to reduce transaction costs while staying in the Ethereum ecosystem. The only unnecessary cost in the process is the wallet fee, and that is the one cost you can eliminate entirely.

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Backpack Wallet charges zero on bridges to Base, Arbitrum, Optimism, Polygon, and every other supported network. You pay gas and protocol fees. Nothing more.

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Download Backpack Wallet and bridge ETH to Layer 2 for free.

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