Softonic

SHA512 Generator

Step 1 / 2
Next

SHA-512 doubles SHA-256’s output width to 512 bits (128 hex characters) and actually runs faster than SHA-256 on 64-bit CPUs because its block operations are natively 64-bit. Paste any text and this generator returns the deterministic 128-character lowercase hex digest. Use it when your standard or protocol specifies SHA-512, modern Linux shadow files ($6$ crypt), some TLS ciphersuites, IPSec, and signature schemes that benefit from a larger security margin. SHA-512 is a one-way hash, not encryption: the digest cannot be reversed back into the original text.

How SHA-512 differs from SHA-256

  1. 1

    Enter text

    Any UTF-8 string: SHA-512 is encoding-independent as long as both sides agree on the byte representation.

  2. 2

    1024-bit block size

    SHA-512 processes 128-byte blocks (vs 64 bytes in SHA-256), which is why it is faster per byte on 64-bit hardware.

  3. 3

    80 rounds of compression

    More rounds than SHA-256's 64, working on eight 64-bit words instead of eight 32-bit ones.

  4. 4

    Copy the 128-char hex digest

    The output is always 128 lowercase hex characters (512 bits). Copy it with one click.

SHA-512 vs SHA-256

Property SHA-256 SHA-512
Output 256 bits / 64 hex 512 bits / 128 hex
Block 512 bits 1024 bits
Rounds 64 80
Word size 32 bits 64 bits
Speed on 64-bit CPU ~1.5 GB/s (w/ SHA-NI) ~1.2 GB/s (software)
Speed on 32-bit CPU Fast Slower (no 64-bit ops)
Best for General purpose Long-term archival hashes

Where SHA-512 is preferred

  • Linux shadow passwords. $6$...$... means SHA-512-crypt with 5000 rounds by default (tunable).
  • Git SHA-256 mode with reduced truncation. Some archival systems truncate SHA-512 to 256 bits for “SHA-512/256” which resists length-extension attacks.
  • SPHINCS+ and other post-quantum signatures. Rely heavily on SHA-512 or SHA-3 variants.
  • TLS 1.2 GCM suites. ECDHE-RSA-AES256-GCM-SHA384 uses SHA-384 (a SHA-512 variant).

Hex and length check

A SHA-512 digest is always 128 hex characters. If your output is shorter, you are looking at a truncated variant (SHA-512/224 or SHA-512/256) or a different algorithm entirely. The digest for the empty string is cf83e1357eefb8bd...a538327af927da3e (128 chars).

When not to use SHA-512

  • When the spec asks for SHA-256. Substituting is a protocol violation.
  • When you need speed on 32-bit or embedded CPUs, SHA-256 is usually a better fit.
  • For password hashing in isolation, use Argon2id or bcrypt even if you pair them with SHA-512.

Frequently Asked Questions

It offers a larger security margin, roughly 2^256 vs 2^128 collision work, but both are considered secure for current and near-future needs. Pick based on protocol fit and performance, not on the intuition that “bigger is safer.”

SHA-512 processes 64-bit words, matching the register width of modern CPUs. SHA-256 works on 32-bit words, so on a 64-bit CPU it effectively wastes half the register. However, Intel/AMD SHA-NI extensions accelerate SHA-256 and can flip this result.

No. SHA-512/256 is a distinct algorithm with different initialization constants and a 256-bit output. It is not the same as truncating this tool’s output to 64 hex chars.

On our server. Your text is sent over an encrypted connection, hashed with the standard SHA-512 function, and the 128-character digest is returned. We do not store what you submit. SHA-512 is one-way, so the digest cannot be reversed or decrypted back into your input.

Related Tools

A1Z26 Cipher Encoder

Encode text using the A1Z26 cipher (A=1, B=2, ... Z=26) or decode a number sequence back to letters, with customizable separator.

Cipher Identifier

Paste ciphertext and the identifier suggests likely encoding/cipher schemes: Base64, hex, binary, Morse, Caesar or substitution, JWT and common hashes.

Caesar Cipher Encoder

Encrypt and decrypt text using the Caesar cipher. Any shift 1-25, supports ROT13 as a special case, preserves punctuation and case.

Atbash Cipher Encoder

Encode or decode text with the Atbash cipher, a Hebrew substitution that maps A-Z to Z-A. Same operation encrypts and decrypts.

Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-384, SHA-512 and CRC32 hashes from text, with a copy-ready digest for checksums and comparisons.

Encryption Identifier

Paste a ciphertext or hash and the identifier suggests likely algorithms or encodings: MD5, SHA, bcrypt, AES, RSA, Base64 and more.

Tool available in other languages