What is the difference between SHA-512 and SHA-256?

SHA-512 produces a 512-bit (128 hex character) hash while SHA-256 produces a 256-bit (64 hex character) hash. SHA-512 is computationally faster than SHA-256 on 64-bit processors due to its internal architecture, and provides a larger security margin. Both are considered cryptographically secure with no known practical attacks.

Can a SHA-512 hash be reversed or cracked?

No. SHA-512 is a one-way hash function — it is computationally infeasible to reverse a hash back to its original input. With 2^512 possible output values, it is astronomically resistant to brute-force attacks. However, simple or common inputs can still be found via precomputed rainbow tables, so always combine with a salt for sensitive use cases.

Is SHA-512 safe for password hashing?

SHA-512 alone is not recommended for password hashing because it is too fast — modern GPUs can compute billions of hashes per second. For passwords, use slow-by-design algorithms like bcrypt, Argon2, or PBKDF2 with a salt. SHA-512 is ideal for file integrity checks, digital signatures, API authentication, and data verification.

What are common use cases for SHA-512?

SHA-512 is used in high-security TLS/SSL certificates, file integrity verification for large files, digital code signing, secure token generation, HMAC authentication in APIs, and archiving systems where long-term data integrity is critical. Its 512-bit output is especially preferred in systems requiring the highest level of collision resistance.

SHA512 Generator — Free Online SHA-512 Hash Tool

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SHA512 Hash Generator

Output Format

Input Text

SHA-512 Hash Output

Frequently Asked Questions

SHA-512 (Secure Hash Algorithm 512-bit) is a cryptographic hash function from the SHA-2 family that produces a fixed 512-bit (64-byte) hash. It offers a larger output than SHA-256, making it even more resistant to brute-force attacks. It is widely used in TLS certificates, digital signatures, and high-security data integrity verification.

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