Scroll Bridge Guide: How to Bridge to Ethereum's ZK-Rollup

Imagine the perfect version of Ethereum—one that offers the same top-tier security and composability but without the congestion and high fees. Scroll makes that a reality. As a ZK-Rollup Layer 2, Scroll scales Ethereum while maintaining decentralization and EVM compatibility, delivering seamless, low-cost transactions with speed.

Since launching in October 2023, Scroll has quietly built a strong foundation, attracting over 6.5 million unique addresses and nearly $75 million in Total Value Locked (TVL).  With around 112 million transactions processed and an average of 50,000+ daily active users, Scroll is establishing itself as a go-to L2 solution in the Ethereum ecosystem.

With DeFi, NFTs, and other web3 applications thriving on Scroll, new opportunities are emerging fast. But if your funds are still on mainnet or another L2, you’ll definitely be interested in a fast, reliable, and cost-effective Scroll bridge.

This guide breaks down your best bridging options and shows why Across is the superior choice, offering near-instant transfers with minimal fees.

Scroll has begun to establish itself as a leading Ethereum Layer 2, offering a ZK-rollup solution to scalability built around decentralization and Ethereum equivalence. 

Unlike non-EVM-compatible rollups that require developers to rewrite smart contracts or adapt to new programming models, Scroll is fully bytecode-compatible with Ethereum. Any Solidity-based dApp can be deployed as-is, without modification. This has made Scroll a natural extension of Ethereum, rather than just another L2.

But Scroll isn’t just one chain—it’s a modular ZK-rollup ecosystem built for scalability and long-term decentralization. Key components of Scroll’s infrastructure include:

By prioritizing scalability, security, and Ethereum compatibility, Scroll is solidifying its position as a flourishing environment for developers and users alike.

As the Scroll ecosystem expands, the demand for bridging assets to the network continues to rise. Scroll offers a robust blend of scalability and security, becoming a hub for extending Ethereum innovation with a growing ecosystem of DeFi, NFTs, and institutional use cases.

The network supports 70+ DeFi, NFT, and gaming applications, all benefiting from low fees and fast speeds, making Scroll an ideal destination for exploring new opportunities:

Additionally, to drive adoption, Scroll introduced Scroll Sessions, an onchain loyalty program that rewards users for their participation and engagement in the Scroll ecosystem. For developers, the network also offers grants and rewards programs, incentivizing builders to migrate to the L2 and launch innovative applications that enhance the user experience.

As crypto expands beyond trading, Scroll is powering real-world applications through its scalable, low-cost settlement layer built on zero-knowledge proof (ZKP) architecture.

The Scroll bridge is the native way to move assets between the Ethereum mainnet and Scroll. It uses a validity-proof mechanism powered by ZKPs to ensure that tokens are accurately accounted for on both networks. 

Unlike its Optimistic Rollup competitor, ZK-rollups do not require an eight-day challenge period for withdrawals. Instead, transactions are finalized on Ethereum once the ZK proof is verified, allowing for fast and efficient withdrawals without long delays.

Here’s an example of the fees and bridging times you can expect from the Scroll native bridge:

When to Use the Native Scroll Bridge

Across: The Most Efficient Scroll Bridge

For users who need faster transactions, lower costs, and seamless crosschain interoperability, Across is the superior alternative to the native Scroll bridge. Instead of relying solely on Scroll’s bridge processing times, Across ensures that assets are transferred to and from Scroll in seconds, at a fraction of the cost.

Why Choose Across:

By reducing bridging times and costs, Across provides an optimal solution for users who need quick and efficient access to their assets on Scroll.

From this and previous crypto bridging guides, you should now have a solid understanding of how bridging works and why Across is the most efficient way to move assets to Scroll. Let’s take a look at what bridging with Across actually entails.

Step 1: Visit app.across.to

To bridge to Scroll, start by visiting the Across’ Scross Bridge app. The first step is to connect your wallet.

Step 2: Select Your Chains

Next, specify your origin (from) chain and destination (to) chain for bridging. For example:

Note: this process is the same if you’re bridging from Scroll back to mainnet. Just reverse the origin and destination chains.

Then specify how much ETH you'd like to bridge. Across will automatically estimate:

Step 3: Confirm and Send

Once you've reviewed the details:

With that, your bridging is complete! 

Pro Tip: Always double or triple-check your transaction details before bridging. Selecting the wrong destination chain would require an additional transaction to reach your intended destination.

The process for bridging back from Scroll to Ethereum is identical—just reverse the origin and destination chains:

Using Across to bridge to Scroll offers several key advantages:

Across achieves this through a decentralized network of relayers who front liquidity to users, allowing for immediate transfers while handling the settlement process in the background.

Bridging to Scroll means gaining access to a rapidly expanding ecosystem of DeFi, NFTs, and real-world applications. But choosing the right bridge makes a big difference.

If trust minimization is your top priority, the official Scroll bridge provides a direct way to transfer assets between Ethereum and Scroll, secured by ZK validity proofs. However, withdrawals typically take 3-5 hours, as transactions must be batched and verified before finalizing on Ethereum.

For faster, lower-cost transfers, Across offers near-instant bridging, helping users move assets to and from Scroll efficiently. Whether you're trading, yield farming, or participating in Scroll-native dApps, using the right bridge ensures seamless transactions without long delays or extra costs.

With Scroll rapidly becoming one of Ethereum's most promising Layer 2 solutions, having a fast, efficient way to move assets is essential. Across delivers near-instant bridging at a fraction of the cost of the native alternative.

Whether you're exploring Scroll's DeFi opportunities, participating in NFT markets, or simply moving assets across chains, Across provides the optimal balance of speed, cost, and security.

Want to experience the fastest, most cost-efficient way to move assets crosschain to Scroll in seconds?

Try Across’ Scroll bridge today

For more information on Scroll, bridging, and crosschain transactions, check out these resources:

If you're new to bridging, check out these guides:

What tokens can I bridge to Scroll? 

Both the native Scroll bridge and Across support ETH and several ERC-20 tokens like USDC, USDT, and DAI. 

Is there a minimum amount required for bridging to Scroll? 

Yes, there are minimum amounts to ensure the transfer costs don't exceed the value being transferred. For ETH, the minimum is typically around 0.005 ETH, but this may vary based on current gas prices.

How do you bridge from Scroll back to Ethereum?

To move assets from Scroll back to Ethereum, you can use either:

How do I bridge ETH from Scroll to other Ethereum L2s?

How do I bridge ETH from other Ethereum L2s to Scroll?

How do I bridge ETH from Scroll to other Ethereum L2s? 

While the native Scroll bridge only supports bridging between Scroll and Ethereum mainnet, Across allows direct transfers from Scroll to other L2s like Arbitrum, Optimism, Base, and more. To bridge from Scroll to another L2:

This direct L2-to-L2 bridging saves you from having to make two separate transactions (L2 to mainnet, then mainnet to another L2), reducing both time and fees significantly.

How do I bridge ETH from other Ethereum L2s to Scroll? 

Similarly, Across allows you to bridge directly from any supported L2 to Scroll in one transaction. The native Scroll bridge would require you to first bridge to the Ethereum mainnet, then make a second transaction to Scroll. To bridge from another L2 to Scroll with Across:

This direct L2-to-L2 functionality is a major advantage of using Across, saving you gas fees on mainnet and reducing the overall bridging time from potentially hours to just seconds.

How long does bridging to Scroll take?

Is bridging to Scroll secure? 

Yes, both options are secure, but they use different security models:

What are the typical bridging costs?

Why is Across faster than the native Scroll bridge? 

Across uses a relayer network that fronts liquidity to users, allowing for immediate transfers while handling settlement in the background. The native bridge must wait for block confirmations and proof generation.