Adding the Arbitrum network to your MetaMask wallet unlocks access to faster, low-cost Ethereum-compatible transactions and decentralized applications (dApps). As one of the leading Layer 2 scaling solutions, Arbitrum enhances Ethereum’s performance while maintaining its robust security. This guide walks you through the step-by-step process of integrating Arbitrum into MetaMask—whether you're using the browser extension or mobile app. We'll also cover key benefits, network details, and frequently asked questions to ensure a smooth setup.
Why Add Arbitrum to MetaMask?
Integrating Arbitrum with your MetaMask wallet offers several compelling advantages:
- Access high-performance dApps: Use decentralized finance (DeFi) platforms, NFT marketplaces, and gaming apps built on Arbitrum with minimal fees.
- Reduce transaction costs: Enjoy significantly lower gas fees compared to Ethereum Mainnet.
- Maintain security: Benefit from Ethereum’s proven security model through Arbitrum’s Layer 2 architecture.
- Seamless token management: Send, receive, swap, and store $ARB and other Arbitrum-native tokens directly in your wallet.
Whether you’re exploring DeFi protocols like GMX or trading NFTs on platforms like TreasureDAO, connecting Arbitrum expands your Web3 experience.
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How to Add Arbitrum to MetaMask via Chainlist (Recommended)
The easiest and safest method to add Arbitrum One is through Chainlist, a trusted community-driven tool that verifies network configurations.
Step 1: Open Chainlist
Visit the official Chainlist website (note: always verify the URL for security). Connect your MetaMask wallet when prompted by clicking “Connect Wallet.”
Step 2: Search and Select Arbitrum One
Use the search bar to type "Arbitrum." From the results, locate Arbitrum One—this is the primary production network. Avoid testnets unless you're developing.
Click the "Add to MetaMask" button under the Arbitrum One entry.
Step 3: Confirm Network Addition
A MetaMask pop-up will appear requesting permission to add the network. Review the details carefully—Chainlist pre-fills accurate RPC and chain information—and click "Next," then "Add Network."
Once confirmed, MetaMask automatically switches to the Arbitrum network, and you’ll see the change reflected in your wallet interface.
This method minimizes human error and ensures you're using verified network parameters.
How to Manually Add Arbitrum to MetaMask (Browser Extension)
If you prefer manual configuration or Chainlist isn't accessible, follow these steps directly within MetaMask.
Step 1: Open MetaMask Extension
Launch your MetaMask browser extension (available on Chrome, Firefox, Brave, Edge). Log in if required.
Step 2: Click “Add Network”
At the top of the interface, click the current network name (e.g., "Ethereum Mainnet"). From the dropdown menu, select "Add Network."
Step 3: Enter Arbitrum Network Details
Fill in the following official Arbitrum One parameters:
- Network Name: Arbitrum One
- New RPC URL:
https://arb1.arbitrum.io/rpc - Chain ID:
42161 - Currency Symbol:
AETH(orETH—both are accepted) - Block Explorer URL:
https://arbiscan.io
⚠️ Accuracy matters: Double-check each field before proceeding. Incorrect data may lead to lost funds or failed transactions.
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Step 4: Save Changes
Click "Save" at the bottom of the form. MetaMask will prompt you to confirm. After confirmation, the network is added and becomes selectable from your network menu.
You can now interact with Arbitrum-based dApps without switching wallets.
How to Add Arbitrum to MetaMask Mobile App
The process on mobile mirrors the desktop version but uses a slightly different navigation path.
Step 1: Open MetaMask Mobile App
Launch the MetaMask app on your iOS or Android device. Ensure you're logged into your wallet.
Step 2: Navigate to Settings
Tap the hamburger menu (three lines) in the top-left corner. Scroll down and tap "Settings."
Step 3: Add Network Manually
Go to "Networks" > "Add Network." Enter the same details as above:
- Network Name: Arbitrum One
- RPC URL: https://arb1.arbitrum.io/rpc
- Chain ID: 42161
- Currency Symbol: AETH
- Block Explorer URL: https://arbiscan.io
Step 4: Save Configuration
Tap "Add" at the bottom. The network will be saved and immediately available in your network list.
Note: Unlike desktop, Chainlist does not support one-click network addition on mobile due to browser limitations.
How to Switch Between Networks in MetaMask
After adding Arbitrum, switching between Ethereum Mainnet and Arbitrum is simple:
- Open MetaMask (extension or app).
- Click or tap the current network name at the top.
- Select "Arbitrum One" or any other added network from the list.
Your wallet balance and transaction history update accordingly based on the selected network.
About Arbitrum: A Layer 2 Powerhouse
Arbitrum is a leading Layer 2 scaling solution designed to improve Ethereum’s scalability and cost-efficiency. It uses optimistic rollups to batch transactions off-chain while submitting proofs back to Ethereum for final settlement—retaining decentralization and security.
Key features include:
- Near-instant transaction finality
- Up to 90% lower gas fees
- Full EVM compatibility (supports existing Ethereum dApps)
- Growing ecosystem with over $2 billion in total value locked (TVL)
Developers deploy Uniswap, Aave, and hundreds of other dApps on Arbitrum, making it essential for serious Web3 users.
About MetaMask: Your Gateway to Web3
MetaMask is the most widely used self-custodial cryptocurrency wallet, available as a browser extension and mobile app. It allows users to manage Ethereum and ERC-compatible tokens across multiple networks—including Layer 2s like Arbitrum, Optimism, and Base.
With MetaMask, you can:
- Interact with DeFi platforms
- Buy, sell, and trade NFTs
- Store digital assets securely
- Approve smart contract interactions
Its intuitive design makes it ideal for beginners while offering advanced features for experienced users.
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Frequently Asked Questions (FAQ)
Can I lose funds by adding a custom network?
Not if you use correct and verified network details. Always double-check Chain IDs and RPC URLs from official sources like arbitrum.io. Avoid suspicious websites offering network configurations.
Why is my balance zero after switching to Arbitrum?
Your assets aren’t automatically bridged. You must transfer tokens from Ethereum Mainnet to Arbitrum using a bridge like Arbitrum Bridge. This process takes ~10 minutes and requires ETH for gas on both chains.
Is AETH the same as ETH on Arbitrum?
Yes. AETH is often used interchangeably with ETH on Arbitrum. Most interfaces display it as ETH. It represents native Ethereum value within the Arbitrum ecosystem.
Do I need a new wallet address for Arbitrum?
No. Your MetaMask address remains the same across networks. However, balances are network-specific—you must bridge funds to use them on Arbitrum.
Can I use MetaMask Snap or hardware wallets with Arbitrum?
Yes. Ledger and Trezor integration works seamlessly with MetaMask on Arbitrum. Ensure your firmware and extensions are up to date.
What should I do if "Add Network" fails?
Clear your browser cache, disable conflicting extensions, or try incognito mode. Alternatively, manually re-enter the RPC URL and Chain ID carefully.
Final Thoughts
Adding Arbitrum to MetaMask is a straightforward process that dramatically improves your Web3 experience. With reduced fees, faster transactions, and access to a thriving ecosystem of dApps, it's no surprise that millions have already made the switch.
Whether you choose Chainlist for simplicity or manual setup for control, ensure accuracy and security every step of the way. Now that your wallet is connected, explore decentralized exchanges, yield farms, and NFT projects built on one of Ethereum’s most powerful scaling solutions.
Stay informed, stay secure, and keep expanding your blockchain journey.