Ethereum Address Checksum Validator & Converter (EIP-55)
Validate and convert Ethereum addresses to EIP-55 checksum format
How to Use ETH Address Checksum
- 1
Paste an address
Enter an Ethereum address with or without the 0x prefix.
- 2
View validation
The tool instantly shows whether the address is valid and if the checksum is correct.
- 3
Copy checksummed address
Copy the properly checksummed version to use safely.
Frequently Asked Questions
Is my data safe?
Yes. All processing happens entirely in your browser. Your data never leaves your device and is never uploaded to any server.
What is EIP-55?
EIP-55 is a checksum standard for Ethereum addresses. It encodes a checksum into the capitalization of the hex characters, allowing wallets to detect typos without changing the address format.
Is a lowercase address invalid?
No. Lowercase addresses are valid but lack checksum protection. Converting to EIP-55 format adds error detection without changing the address itself.
Learn more
About ETH Address Checksum
Validate Ethereum addresses and convert them to EIP-55 checksummed format. Detects whether an address has a valid checksum, is lowercase (unchecksummed), or has an incorrect checksum. All processing happens in your browser using keccak-256 hashing.