Presign

Know exactly what you sign.

Checking… Connect wallet

Transaction Security

Paste a transaction signature, or a serialized legacy or versioned (v0 / v1) transaction in base64 or base58. We decode it, simulate it against current chain state and explain what would happen — before you sign.

Never paste a private key or seed phrase anywhere. A transaction does not contain your keys.

No transaction analyzed yet. Want an example? The Demo includes a suspicious transaction.