Finance & Economics / Blockchain & Crypto
Ethereum Address Checksum
Enter an Ethereum address (starting with 0x)
EIP-55: Ethereum Address Checksum
Ethereum addresses are 42 characters long (0x + 40 hex digits). EIP-55 introduces a checksum by capitalizing certain letters based on the address's hash.
How It Works:
- Take the lowercase address (without 0x)
- Hash it using Keccak-256
- For each character in the address:
- If it's a letter and hash digit ≥ 8: uppercase
- Otherwise: lowercase
Examples:
With checksum: 0x5aAeb6053F3E94C9b9A09f33669435E7Ef1BeAed
Without: 0x5aaeb6053f3e94c9b9a09f33669435e7ef1beaed
Why It Matters:
- Detects typos in addresses
- Reduces risk of sending funds to wrong address
- Backward compatible (all-lowercase still works)
- Supported by most modern Ethereum wallets
⚠️ Important:
Always double-check addresses before sending crypto. Even with checksums, verify the entire address. This tool validates format only, not ownership.
Use this ethereum address checksum to compute blockchain & crypto results from your inputs.