सिमुलेशन
Transaction Simulator
Preview any transaction before signing. Check gas costs, approvals, and security risks — without spending gas.
Leave empty for simple ETH transfer. Paste calldata for contract interactions.
Gas & Cost
Gas Estimate
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Gas Price
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Total Cost
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From Balance
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Simulating transaction on-chain...
About Transaction Simulation
This tool uses public RPC endpoints to simulate transactions without broadcasting them. It estimates gas, checks balances, decodes calldata, and identifies potential risks like unlimited approvals or DeFi swaps. Always verify transactions in your wallet before signing.
tools.rate_limits: 3/day (public), 20/day (free account), unlimited (Pro).