Tunnel in 3 steps
-
Choose how much BTC to send and paste the Ethereum (Base) address that should receive funds on Base mainnet.
-
Open the order to freeze the quote and reveal a one-time deposit destination.
-
Broadcast BTC to that destination. Once confirmations clear, ETH is pushed to your payout wallet.
Before you broadcast
- One on-chain confirmation is usually enough before your payout leg starts.
- BTC confirmation time depends on mempool congestion and the fee you paid.
- SegWit deposit addresses keep fees lower. If your wallet cannot send to SegWit, contact support before sending.
- Still waiting on ETH? Give the wallet a few minutes to sync, then share your Exchange ID with support if the order already lists a payout hash.
Bitcoin — the original digital asset
Since 2009, Bitcoin has been the benchmark cryptocurrency — deep liquidity, wide recognition, and the default on-ramp for cross-chain swaps.
Before you send BTC
- Confirm your wallet can send to SegWit (bc1…) addresses.
- Leave enough for a network fee — low fees mean slower confirmation.
- Send only BTC on Bitcoin mainnet to the address on your order page.
How long until Bitcoin confirms?
Block times vary with network load and your chosen fee.
- Use mempool.space or similar tools to check whether your fee is competitive.
- Explorers show queue position — compare against pending transaction volume.
- Average block interval is ~10 minutes, but longer gaps happen.
Why traders move BTC to other chains
Bitcoin offers deep liquidity and wide recognition — many swaps start with BTC as the funding asset.
Moving into Ethereum, stablecoins, or alt L1s lets you access DeFi, payments, or portfolio diversification without a custodial account.
ETH on Base — Coinbase L2
Native ETH on Base — Ethereum's value on Coinbase's L2 with low fees, fast finality, and growing on-chain activity.
Base ETH not received?
Confirm your wallet is on Base mainnet and fully synced — not Ethereum L1.
Base ETH payout tips
- Payouts go to Base — verify your wallet network is Base (chain ID 8453).
- Check Basescan with the payout tx hash from your order page.
- Bridging to Ethereum L1 is a separate step after you receive ETH on Base.
Before you swap
Avoid wrong-network deposits and address format mistakes — read these guides first.
Coin swap hubs
More no-KYC swap pairs and guides for each asset.
Frequently asked questions
Do I need KYC to swap BTC for ETH on TunnelSwap?
No. TunnelSwap is an anonymous no-KYC, privacy-first exchange. There is no account, no ID upload, and no standing balance for Bitcoin → Ethereum (Base) swaps.
How fast is a BTC → ETH swap?
Most routes settle within minutes. Final timing follows Bitcoin mainnet deposit confirmations and Base mainnet payout speed.
Does TunnelSwap hold my BTC or ETH?
No. You fund the deposit from your wallet and ETH is sent straight to the address you paste — non-custodial, wallet to wallet.
What if I use the wrong network for BTC?
Only send on the network shown for the order (Bitcoin mainnet). Wrong-chain deposits can be unrecoverable — review the safety guides before you broadcast.