EIP-55 Ethereum Address Checksum Converter & Validator
Convert lowercase Ethereum addresses to EIP-55 mixed-case checksum format or verify whether an existing address matches its cryptographic checksum locally.
How to Use
Enter or paste any 20-byte (40 hex character) Ethereum address with or without the 0x prefix.
Review the real-time checksum validation status (Valid Checksum, Lowercase without checksum, or Invalid Mismatch).
Copy the standardized EIP-55 checksummed address for secure transaction dispatch.
Use the sample buttons to test known valid addresses, lowercase addresses, and simulated typos.
Why Use EIP-55 Ethereum Address Checksum Converter & Validator?
Built-in Typo Prevention
EIP-55 checksum casing provides a 99.986% error detection rate against mistyped addresses.
Strict Casing Verification
Distinguishes between harmless lowercase input and potentially malicious or corrupted mixed-case addresses.
Zero Wallet Tracking
Validates addresses locally without pinging Etherscan, RPC nodes, or analytics trackers.
EVM Standard Support
Fully compatible with Ethereum, Polygon, Arbitrum, Optimism, Base, BSC, and all EVM chains.
About This Tool
The EIP-55 Address Checksum Converter & Validator transforms lowercase Ethereum addresses into standardized mixed-case checksum addresses and validates existing addresses against their Keccak-256 hash. EIP-55 provides built-in typo and address spoofing protection across all EVM-compatible blockchains without changing the underlying address bytes.
Frequently Asked Questions
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