Smart Contract Security Tools
Free utilities for blockchain developers, security auditors, and smart contract hackers. Convert units and estimate audit costs before you ship.
Browse smart contract tools
Audit Cost Estimator
Calculate smart contract audit costs based on code complexity, lines of code, and project requirements.
Function Selector Calculator
Compute Solidity function selectors, event topic hashes, and error selectors from signatures using keccak256.
Keccak256 Online Hash
Hash any string or hex input with keccak256 - the hash function powering Ethereum addresses, function selectors, event topics, and storage slots.
Auditor Salary Calculator
Estimate smart contract auditor salary in 2026 by experience, region, work style, and specialized skills. Compare full-time, freelance, and contest-based earning paths.
Turn these checks into audit instincts
These tools show you the numbers. The course teaches you to catch the bug before it ships.