What You Need
- A Web3 wallet — MetaMask (EVM chains), Phantom (Solana), or a multi-chain wallet like Rabby
- Tokens to bridge — ETH, USDC, USDT, or other supported assets
- Gas on the source chain — ETH for Ethereum/L2s, SOL for Solana
- Gas on the destination chain — some bridges fund your first transaction; others require you to have gas already
Step-by-Step Guide
Step 1: Choose Your Bridge
Select a bridge based on your source chain, destination chain, and transfer amount:
| Bridge | Best Routes | Speed | Fees | Security |
|---|---|---|---|---|
| {'text': 'Across Protocol', 'highlight': True} | ETH L2s | 1-3 min | 0.04-0.12% | Optimistic verification |
| Stargate | Cross-chain (all) | 5-15 min | 0.06-0.15% | LayerZero messaging |
| Orbiter Finance | ETH L2s (small) | 30 sec-2 min | 0.03-0.10% | Maker-based |
| Hop Protocol | ETH L2s | 2-10 min | 0.05-0.20% | Bonder network |
Step 2: Open the Bridge Interface
Navigate to your chosen bridge (e.g., across.to, stargate.finance, orbiter.finance). Alternatively, use a bridge aggregator like jumper.exchange (Li.Fi) which compares all bridges automatically.
Step 3: Select Source and Destination Chains
Choose where your tokens currently are (source) and where you want them (destination). Select the token you want to bridge. The interface will show the estimated amount received after fees.
Step 4: Connect Your Wallet
Click "Connect Wallet" and approve the connection. Make sure your wallet is on the correct source network. If bridging to a different ecosystem (e.g., EVM to Solana), you may need to connect two separate wallets.
Step 5: Enter Amount and Review
Enter the amount to bridge. Review: the fee (in tokens and USD), estimated arrival time, destination address, and the exchange rate. Compare with at least one other bridge to ensure competitive pricing.
Step 6: Approve and Send
If bridging an ERC-20 token (not ETH), you first need to approve the token spend. Then confirm the bridge transaction. You will pay gas on the source chain only — most bridges handle destination gas.
Step 7: Track and Verify
After submitting, the bridge interface shows a progress tracker. Once complete, switch your wallet to the destination chain and verify you received the tokens. Keep the transaction hash for reference.
Step 8: Get Destination Gas (if needed)
If you bridge to a chain where you have no gas token, use a gas faucet or bridge a small amount of the native gas token first. Some bridges like Across offer a "gas on destination" feature for small ETH amounts.
Fees and Costs
- Bridge fees: 0.03-0.20% of the transfer amount depending on bridge and route
- Source chain gas: $2-10 on Ethereum mainnet, $0.05-0.30 on L2s, $0.01 on Solana
- Token approval gas: $3-5 on Ethereum (first time per token per bridge)
- Example: Bridge 1 ETH from Ethereum to Arbitrum via Across: ~$4 gas + ~$2 bridge fee = ~$6 total
- Example: Bridge 1000 USDC from Arbitrum to Base via Orbiter: ~$0.10 gas + ~$0.50 bridge fee = ~$0.60 total
Risks
- Smart contract exploits: Bridges are the #1 attack vector in DeFi. Over $2.5B has been stolen from bridges since 2021 (Ronin, Wormhole, Nomad). Only use audited, established bridges
- MEV attacks: Large bridge transactions can be front-run. Use bridges with MEV protection or split large transfers into smaller amounts
- Stuck transactions: Bridge failures can leave tokens in limbo. Always keep your transaction hash and use the bridge's support/recovery tools
- Phishing: Fake bridge websites are common. Bookmark official URLs and verify contracts before approving
- Destination chain issues: If the destination chain has problems (congestion, outage), your tokens may be delayed but are typically recoverable
Pro Tips
- Always use a bridge aggregator first: Jumper.exchange (Li.Fi) or Bungee compares all bridges in real time — often saving 30-50% on fees
- Bridge USDC/USDT instead of ETH: Stablecoins often have better liquidity and lower slippage on bridges
- Use native bridges for large amounts: The official Arbitrum/Optimism bridges are the most secure, though slower (7-day withdrawal to L1)
- Batch bridge for gas savings: Bridge once with a larger amount rather than making multiple small transfers
- Check bridge TVL: Higher TVL means better liquidity and lower slippage. Avoid bridges with under $10M TVL
Bridging is the connective tissue of multi-chain DeFi. Master it, and you unlock opportunities across every ecosystem. Start with small test transfers, verify URLs carefully, and prefer established bridges over new ones.
Related guides: How to Trade on DEX | How to Use DeFi Aggregators | How to Farm Yield in DeFi
Frequently Asked Questions
What is a crypto bridge?
A crypto bridge is a protocol that transfers tokens between different blockchains. For example, moving ETH from Ethereum mainnet to Arbitrum, or USDC from Ethereum to Solana. Bridges lock tokens on the source chain and mint equivalent tokens on the destination chain.
Which crypto bridge is the cheapest?
In 2026, Across Protocol generally offers the lowest fees for Ethereum L2 bridges (0.04-0.12%), while Orbiter Finance is cheapest for small transfers. Stargate is best for large cross-chain transfers. Always compare fees on a bridge aggregator like Li.Fi or Bungee before bridging.
How long does bridging take?
Speed varies by bridge and route. Across Protocol completes most L2 bridges in 1-3 minutes. Stargate takes 5-15 minutes for cross-chain transfers. Native L2 bridges (official Arbitrum/Optimism bridges) take 7 days for withdrawals back to Ethereum. Third-party bridges use liquidity pools to offer near-instant transfers.
Is bridging crypto safe?
Bridging carries smart contract risk — bridges have historically been the most exploited category in DeFi (over $2.5B lost). Use established bridges with strong audit histories. Never bridge to an unfamiliar chain, and always verify the bridge URL to avoid phishing.