SHA-3/512 generator

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Create a SHA3-512 hash online from any text or file. This SHA3-512 generator returns a fixed 512-bit digest as a 128-character hexadecimal string. Use it for file integrity checks, API request signing, content addressing, and modern cryptography workflows. Common intents include generate SHA3-512 hash online, SHA3-512 checksum calculator, SHA3-512 hash of a string, and calculate SHA3-512 of a file online.

What is SHA3-512?

SHA3-512 is part of the NIST-standardized SHA-3 family (FIPS 202). Unlike SHA-2 (e.g., SHA-256/SHA-512), SHA-3 uses a sponge construction based on Keccak permutations, offering strong security properties and resistance to length-extension attacks. The output is always 512 bits (128 hex chars). Note that Keccak-512 and SHA3-512 use different padding—digests are not interchangeable (Keccak vs SHA3-512).

How to use the SHA3-512 Generator

  1. Enter text or upload a file you want to fingerprint.
  2. Click Generate to compute the SHA3-512 digest.
  3. Copy the 128-character hex output and compare it with a published checksum or store it for verification.

When should you use it?

  • Release integrity: Publish/verify a SHA3-512 checksum for installers, archives, firmware, and containers.
  • API & signatures: Use as the digest input for digital signatures (RSA/ECDSA) or HMAC-SHA3-512 request signing.
  • Content addressing & deduplication: Create deterministic IDs for binaries, datasets, media, and backups.
  • Research & compliance: Compare SHA-2 vs SHA-3 behavior, avalanche properties, and interoperability.

Who is this for?

  • Developers generating secure checksums and signature inputs for apps and packages.
  • DevOps & SRE teams validating artifacts across environments and CI/CD stages.
  • Security practitioners standardizing on SHA-3 primitives in modern pipelines.
  • Students & researchers studying sponge-based hashing and Keccak permutations.

Best practices & caveats

  • Password storage: Don’t store raw SHA3-512 hashes. Use a KDF such as Argon2, bcrypt, or PBKDF2 with salt and cost factors.
  • Authenticity: For integrity and authenticity, use HMAC-SHA3-512 with a secret key instead of plain hashing.
  • Exact bytes matter: Encoding (UTF-8 vs UTF-16), hidden whitespace, and line endings (\n vs \r\n) change the hash.
  • Interchangeability: Keccak-512 ≠ SHA3-512. If a system expects Keccak (some blockchain tools), do not substitute SHA3-512.
  • Multiple checksums: For broad compatibility, you may publish SHA3-512 alongside SHA-256 or SHA-512.

Examples

SHA3-512 of a string

Input:  "hello world"
Output: 840006653e9ac9e95117a15c915caab81662918e925de9e004f774ff82d7079a
        40d4d27b1b372657c61d46d470304c88c788b3a4527ad074d1dccbee5dbaa99a

SHA3-512 of a file (command-line references)

# OpenSSL 3+ (macOS/Linux/Windows)
openssl dgst -sha3-512 /path/to/file

# Python (any OS)
python - <<'PY'
import hashlib, sys
with open(sys.argv[1], 'rb') as f:
    print(hashlib.sha3_512(f.read()).hexdigest())
PY /path/to/file

# Node.js (OpenSSL 3-enabled builds)
node -e "const fs=require('fs'),c=require('crypto');\
console.log(c.createHash('sha3-512').update(fs.readFileSync(process.argv[1])).digest('hex'))" /path/to/file

FAQ

Is SHA3-512 secure?

Yes—SHA3-512 is a modern, standardized hash suitable for integrity and signing workflows. For passwords, always use a dedicated KDF.

Can I decrypt a SHA3-512 hash?

No. Hashes are one-way. “Decryption” sites only match against precomputed databases (rainbow tables).

Why doesn’t my digest match the publisher’s?

Verify you hashed the exact same bytes: check encoding, newline differences, hidden characters, and ensure you didn’t hash a compressed wrapper instead of the raw file.

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