Smart Contract Vulnerability Scanner
Paste your Solidity code for an instant, private security scan mapped to the OWASP Smart Contract Top 10. No sign-up, nothing uploaded.
🔒 100% private, your code never leaves your browser.
How the Solidity scanner works
This free tool runs a set of heuristic checks over your Solidity source and flags patterns that commonly lead to exploits, reentrancy, tx.origin authorization, unchecked external calls, delegatecall and upgradeability risks, unchecked arithmetic, and weak sources of randomness. Each finding is mapped to a category from the OWASP Smart Contract Top 10 (2026) so you can dig into the real-world exploits behind it.
Because it is pattern-based, it is fast and private but not exhaustive, it will not catch business-logic or economic vulnerabilities. Use it as a first pass, then book a professional smart contract audit before mainnet.
Frequently asked questions
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Ready for a real security audit?
This scan catches common patterns. The exploits that drain treasuries need experienced human auditors. Get a manual review before you deploy.