How to Bridge to zkSync with Across Protocol

You can bridge to zkSync in seconds using Across.

zkSync is a Layer 2 network built on Ethereum that uses zero-knowledge rollups to offer lower fees, faster transactions, and the same security guarantees as Ethereum mainnet. It’s where users go when they want Ethereum’s trust with web3’s speed.

To get started on zkSync, you’ll need to bridge your assets from another chain, usually Ethereum or another L2. Bridging moves your tokens securely between blockchains, giving you access to zkSync’s dApps, DeFi protocols, NFT markets, and gaming ecosystems.

If you’ve ever wondered how to bridge to zkSync easily and safely, this guide walks you through every step using Across Protocol: a faster, cheaper, and more secure way to move your assets.

Before bridging tokens to zkSync, make sure you’re set up correctly:

Start by visiting the official Across app. This is the secure interface where all bridging takes place.

Always make sure you’re on the official URL (app.across.to) to protect your assets. If it’s your first time using Across, you can also check out the Across documentation for extra onboarding help.

Once you’re on the Across app, click Connect Wallet. You can use any major Ethereum-compatible wallet such as MetaMask, Coinbase Wallet, or Rabby.

Before connecting, make sure your wallet is set to your origin chain (the chain that your funds are currently on). For the sake of this example, let’s use Ethereum mainnet.

When you connect, you’re simply authorizing the app to view and interact with your wallet, not giving control of your assets away.

In the Across app, start by choosing the origin chain and the token you want to send.

Across supports a wide selection of networks, including Ethereum, Solana, BNB Smart Chain, Hyperliquid, Monad, and many more.

Use the top dropdown menu in the app to select both:

Across automatically detects the available balance in your connected wallet and displays estimated gas fees before you proceed.

Next, choose zkSync as your destination chain and select the token you want to receive.

Across lets you bridge and swap in one step. For example, you can send ETH on Ethereum and receive USDC on zkSync in a single transaction. Or you can simply bridge a single token without swapping it. The choice is yours.

Use the bottom dropdown menu in the app to:

After selecting your origin and destination tokens, enter the amount you want to bridge or bridge + swap.

Across will automatically calculate and show everything you need to know before confirming:

This transparency ensures you know exactly what to expect before signing the transaction.

Once everything looks good, review the transaction details carefully: origin and destination networks, asset, amount, and estimated fees.

Then, approve the transaction in your wallet and sign to confirm. Across’s relayer network immediately picks up your transfer and competes to fulfill it as fast as possible.

In most cases, you’ll see your funds appear on zkSync in less than 3 seconds, a massive improvement over traditional bridges.

After you submit your transaction, Across’s decentralized relayers go to work. They front the liquidity to deliver your tokens on zkSync instantly, while the protocol later verifies and settles the transfer securely on Ethereum.

This intent-based system ensures you always receive your funds first. No waiting for confirmations.

You can monitor your bridge status on the Across dashboard or by viewing the transaction on a zkSync block explorer.

Once complete, make sure you have a small amount of ETH on zkSync to cover future gas fees.

Across Protocol is one of the most efficient and user-friendly ways to bridge to zkSync. It’s designed for speed, cost-efficiency, and security, which is everything users care about when moving funds between chains.

Unlike legacy or native bridges that rely on slow settlement times or higher fees, Across uses an intent-based design. That means you simply state what you want (e.g., “Send 1 ETH from Ethereum to zkSync”) and Across handles the rest. Behind the scenes, a network of independent relayers competes to complete your transfer as fast and cheaply as possible, often in under 60 seconds.

Because it’s non-custodial, you stay in control of your assets the entire time. And with support for multiple networks (including Ethereum, Arbitrum, Optimism, zkSync, Solana, BNB Smart Chain, and many more) Across gives you a truly seamless crosschain experience.

Here’s why Across stands out as one of the best bridges for zkSync:

With Across, you get a one-click experience that feels as fast as swapping tokens, only it’s crosschain.

Across stands out as the fastest and most capital-efficient bridge in the crypto ecosystem:

Before bridging, keep a few practical details in mind:

Following these steps will help you bridge to zkSync smoothly and securely.

Usually under 3 seconds. Across’s relayer network fulfills your transfer instantly, then settles it securely in the background.

Across charges a small liquidity-provider fee (0.06–0.12%) and a variable relayer fee, both shown clearly before confirmation.

Yes. Across uses a non-custodial, intent-based architecture and decentralized relayers to ensure your assets are always secure.

If your wallet doesn’t display zkSync automatically, you’ll need to manually add the network to view your assets.

You can bridge ETH, USDC, and most ERC-20 tokens supported by zkSync.

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