Optimism Swap
Live preview — open the official Optimism Swap app from your own wallet.
OP Mainnet chain ID 10ETH is used for gasUniswap deployments include Optimism
What is Optimism Swap?
Optimism Swap is a focused route for trading tokens on OP Mainnet, not a separate exchange or wallet. It points users to Uniswap's official interface while keeping network details aligned with Optimism network information.
Optimism Swap at a glance
CategoryLayer 2 token swaps
NetworkOP Mainnet
TokenOP
CustodyNon-custodial when swapping from a wallet
Gas TokenETH on OP Mainnet
Optimism swap fees on OP Mainnet
An Optimism swap usually has two cost layers: the DEX or aggregator trade cost and the OP Mainnet transaction fee. The trading cost can include pool fees, price impact, slippage, and aggregator route choices. The network fee is paid in ETH on OP Mainnet and is typically much lower than Ethereum L1, but it still changes with network conditions and calldata costs. If the swap starts on Ethereum or another chain, bridging costs may be the larger expense. For app builders, Optimism documents fee estimation and transaction parameters in its developer docs, while users should compare quotes across reputable DEX interfaces before signing.
How to swap ETH to OP on Optimism
To swap ETH to OP on Optimism, the wallet must be connected to OP Mainnet and hold enough ETH on OP Mainnet to pay gas. Users can bridge ETH from Ethereum or another supported chain, then use a DEX or swap aggregator that supports OP Mainnet liquidity. The quote should show the input token, output token, minimum received, route, price impact, and network fee. OP is the governance token for the Optimism ecosystem, while ETH is the gas token used for transactions. Always verify the chain in the wallet prompt so the trade is not accidentally submitted on Ethereum L1 or a different OP Stack chain.
Best DEXs for Optimism swaps
The best Optimism swap venue depends on the token pair and trade size. Deep routes for common assets such as ETH, USDC, OP, and stablecoins often pass through major DEXs or aggregators on OP Mainnet, while long-tail assets can have thin liquidity and higher price impact. Instead of choosing only by brand, compare execution price, minimum received, route transparency, and approval requirements. DeFiLlama's OP Mainnet data and recognized DEX analytics can help identify active liquidity venues. For large trades, split quotes and watch slippage; for small trades, the network fee and approval transaction may matter more than a tiny price difference.
Optimism swap supported tokens and networks
Optimism swaps happen on OP Mainnet, but the broader Optimism ecosystem also includes OP Stack chains in the Superchain. A token must have liquidity and a valid contract address on the network where the swap is executed. Common OP Mainnet swap assets include ETH, OP, USDC, USDT, WBTC, and protocol tokens with active pools. Bridged assets can have multiple representations, so contract verification matters. If a user wants to swap an asset from Ethereum, Arbitrum, Base, or another network into OP Mainnet, the route may combine bridging and swapping through a cross-chain aggregator rather than a single local DEX trade.
How to swap Optimism Swap
- Open the appUse the primary button to open Uniswap with the Optimism chain context.
- Connect your walletConfirm the domain is app.uniswap.org before approving any wallet prompt.
- Select OP MainnetKeep both assets on OP Mainnet and make sure you have ETH available for gas.
- Review and signCheck token addresses, price impact, route, and minimum received before submitting.
Ready to swap?
Open the official Optimism Swap app and verify the domain before you sign.
Optimism swap vs Ethereum mainnet swap
| Dimension | Optimism swap | Ethereum mainnet swap |
|---|---|---|
| Gas token | ETH on OP Mainnet | ETH on Ethereum |
| Typical network cost | Lower L2 transaction fees | Higher L1 gas exposure |
| Liquidity | Strong for major OP Mainnet assets | Deepest for many blue-chip assets |
| Bridge need | Needed if funds start off OP Mainnet | Not needed for assets already on Ethereum |
Optimism Swap FAQ
What gas token do I need to swap on Optimism?
You need ETH on OP Mainnet to pay gas for swaps, approvals, and other wallet transactions. OP is the ecosystem and governance token, but it is not the gas token for normal OP Mainnet transactions. Keep a small ETH balance on the same network before starting a swap.
Why did my Optimism swap quote change?
Swap quotes change because pool prices, liquidity, price impact, and network conditions move between quote and execution. Long-tail tokens can move more sharply than ETH, USDC, or OP. If the final amount drops below the minimum received set by your slippage tolerance, the transaction may revert.
Can I swap directly from Ethereum to Optimism?
Yes, but it is usually a cross-chain route rather than a simple same-chain swap. A bridge or cross-chain aggregator moves value from Ethereum to OP Mainnet and may also perform the token conversion. Review route provider, fees, expected time, and destination token address before signing.
Are Optimism swaps reversible?
No. Once a swap transaction is confirmed onchain, it cannot be reversed by the network. A failed transaction may still consume gas, and a successful trade will deliver the output token according to the executed route. Check token addresses, minimum received, and network before confirming.
Why do I need token approval before an Optimism swap?
ERC-20 tokens require an approval before a smart contract can spend them for a swap. The approval is separate from the trade and can be limited or unlimited depending on the wallet and app. For better risk control, approve only the amount needed or revoke unused allowances later.
What is the difference between OP and OP Mainnet?
OP is the Optimism ecosystem token. OP Mainnet is the Layer 2 blockchain network where users send transactions, bridge assets, and use DeFi apps. Swapping OP means trading the token; swapping on OP Mainnet means executing a trade on the Optimism network.