2121OnSolONE GAME. TWENTY-ONE. ON SOLANA.
21ONSOL LEARN

Fairness & Security

Guides to randomness, server-side game state, wallet safety, transaction verification and trust signals.

Play Blackjack
BLACKJACK 21

Learn the flow, then open the table.

Use the PLAY balance to understand the interface before deciding whether to connect a Solana wallet.

Open Blackjack
SOLANA WALLET

Choose how to connect

21OnSol never asks for your seed phrase or private key.
GET SOL

Fund your wallet

Destination wallet: —

Need SOL? Open 21OnSol inside your wallet app and use that wallet's own Buy SOL feature, then return here to deposit.

Purchase availability, payment methods and identity checks are controlled by the wallet or its purchase provider. 21OnSol never receives your card details.
WALLET & SOLANA STATUS

Wallet status

Never share your seed phrase or private key with 21OnSol, support staff, or anyone else.