String Hasher (SHA-256)

Compute cryptographic hashes locally. Your input string is never sent over the network.

What is Hashing?

A hash function maps data of arbitrary size to fixed-size values. SHA-256 (Secure Hash Algorithm 2) produces a 256-bit (32-byte) hash value, typically rendered as a 64-character hexadecimal string.

Common Mistakes

  • Hashing Passwords Without Salt: Storing passwords as raw SHA-256 hashes is insecure because attackers use pre-computed Rainbow Tables. Always use Argon2, bcrypt, or PBKDF2 for password storage.

FAQ

Q: Can I reverse a hash?
A: No. Cryptographic hashes are one-way mathematical functions.

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