Swap ETH and ERC-20 tokens with no registration β and with a clear picture of the gas costs that sit either side of the trade.
In any Ethereum swap there are two costs: the exchange spread, and the gas you pay to get your funds out of your own wallet. The first is fixed at quote time. The second is entirely yours to manage, and the gap between a good and a bad moment is large enough to be worth a minute of attention.
Every operation consumes a fixed amount of computational work. What fluctuates is the price paid per unit of that work, and that depends on how many people are competing for the network at the same instant. The same transfer can cost several times more on a busy weekday afternoon than on a quiet Sunday.
Underpaying does not produce an error. It produces a transaction that sits pending until the network clears or until you replace it with a higher-priced version. Most wallets expose a speed-up option for exactly this case.
This catches people who budget for one and pay for the other. Moving ETH is a simple transfer. Moving an ERC-20 token executes contract code, which consumes considerably more gas. If you are swapping USDT or USDC out of Ethereum, budget accordingly.
The related trap: gas is payable only in ETH. A wallet holding nothing but tokens holds a balance it cannot move. If you are converting everything, leave a margin sized for several future operations, not one.
Ethereum uses an account model. Most people use a single address for years, and every action it takes is permanently and publicly linked to every other. Anyone with your address can read the full history β balances, tokens held, contracts interacted with, in order.
Creating a fresh account is instant and free. Receiving into one keeps this transaction separate from whatever came before. The trade-off is that a brand-new account has no gas, and cannot move even the ETH it just received β so swap an amount that leaves headroom rather than landing at the exact figure you intend to deploy.
One more permanent record worth knowing about: token approvals. Every permission you grant a contract stays recorded and stays active until you revoke it. Most people forget they granted them; the chain does not.
There is a real window between the rate you are shown and the funds arriving: your deposit must confirm on Ethereum, and the outgoing side must confirm on the destination chain. Prices move during that interval. This is why fixed-rate quotes carry a time limit β the limit is what makes the guarantee possible.
No. No registration, no email, no identity check. You provide a destination address and nothing else.
Yes β USDT and USDC on Ethereum are supported alongside native ETH, in both directions.
Almost always because the gas price offered was below what the network was charging at that moment. It has not failed; it is queued. Use your wallet's speed-up option or wait for demand to fall.
If your goal is cheap Ethereum, Layer 2 networks reduce cost substantially β but each is a distinct destination with its own addresses and its own exit route. Decide where you want to end up before you swap, because arriving on mainnet and then bridging means paying twice.