The testnet KLAY faucet runs on the Baobab network. The faucet can be accessed from the Baobab Klaytn Wallet. To receive testnet KLAY, you should have a valid Klaytn account.
Load your account into the wallet using your private key or keystore file. Testnet KLAY will be sent to the loaded account.
Run Faucet button will send you 5 testnet KLAY and update your balance. Note that you can run the faucet for each account once every 24 hours.
Below is the inclusive but not exhaustive list of major KLAY exchanges.