Swap testnet coins, instantly and non-custodially
Atomic swaps between Litecoin testnet (tLTC) and Bitcoin testnet4 (tBTC). You sign both sides in your own wallet — nobody ever holds your coins. If anything stalls, you get an automatic refund of what you locked.
Runs the swap right here in your browser — non-custodial, keys never leave this device. Or use it in TestnetWallet.
Setup
You pick a pair and amount. Your wallet and the maker agree the rate and two refund deadlines over a relay that only passes messages — it holds no keys or coins.
You lock
Your wallet locks your coins in a hash-timelock contract (HTLC) on the send chain. Only you can refund it after your deadline.
They lock
The maker sees your funded contract and locks the other coin in a matching HTLC on the receive chain, with a shorter deadline.
You claim
You claim the maker's coins by revealing a secret. That same secret lets the maker claim yours. Swap done — atomically.
The worst case if anything stalls: you reclaim exactly what you locked after your deadline. A maker can never take your coins — it can't claim yours without revealing the secret that lets you claim its. Read the details →
Non-custodial & atomic
The service never holds your funds. Coins are only ever in a contract that completes the swap or refunds to you.
Testnet only
tLTC and tBTC are worthless test coins. This is infrastructure for builders, not a market — the rate is a fixed nominal value.
Single maker, two pairs
One always-on maker (run by us, funded from CypherFaucet) is the counterparty. The pairs are tLTC↔tBTC.