Hash Generator
Generate cryptographic hashes using SHA-256 and Keccak-256 algorithms. Essential for blockchain development and security applications.
Hash Generator
Generate cryptographic hashes using SHA-256 and Keccak-256 algorithms
13 characters
Algorithm Comparison
⚠️ This tool is for educational purposes. Never hash sensitive data like passwords in a browser - use proper server-side hashing with salts.
How to Use
- 1Enter text — Type or paste the text you want to hash.
- 2Select algorithm — Choose SHA-256, Keccak-256, or another hash algorithm.
- 3View hash — See the generated hash in hexadecimal format.
- 4Copy result — Copy the hash with or without the 0x prefix.
Frequently Asked Questions
What is a cryptographic hash?
A cryptographic hash is a fixed-size output generated from any input data. It is deterministic (same input = same output), one-way (cannot be reversed), and collision-resistant.
What is the difference between SHA-256 and Keccak-256?
SHA-256 is used in Bitcoin and general cryptography. Keccak-256 is used in Ethereum for address generation and transaction signing. Both produce 256-bit hashes but use different algorithms.
Why is Keccak-256 different from SHA-3?
Keccak won the SHA-3 competition, but Ethereum uses the original Keccak-256 before it was standardized as SHA-3. The standardized SHA-3 has slightly different padding.
Can I use this for password hashing?
No. Password hashing requires specialized algorithms like bcrypt, scrypt, or Argon2 that include salting and are intentionally slow to prevent brute-force attacks.
What is the 0x prefix?
The 0x prefix indicates a hexadecimal number. It is commonly used in Ethereum and other blockchain contexts to distinguish hex values from decimal numbers.