Hashes hash-wasm hash

SHA3-256 Hash Generator - Free Online Tool

Generate modern SHA3-256 hashes with sponge construction.

sha3-256.workspace
1 option
0 bytes UTF-8, Hex, Base64, or File input
Options

Secure client-side computation. No data leaves your browser. Privacy Security

Result Output

What Is SHA3-256?

SHA3-256 is a NIST-standardized SHA-3 hash function built on the Keccak-f permutation that produces a 256-bit hash using the sponge construction with 1600-bit state and 24 rounds.

Specifications

Output Size 256 bits
Standard FIPS 202
Standard Year 2015
Origin Keccak submission to NIST SHA-3 competition
Origin Year 2008

Use Cases

  • Next-generation cryptographic systems
  • Post-quantum cryptography preparations
  • High-assurance security applications
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Security Notice

SHA3-256 is suitable for cryptographic integrity checks and fingerprints when used appropriately. Use HMAC or KMAC when you need message authentication, and use a dedicated KDF such as Argon2, bcrypt, or scrypt for password storage.

Related Tools

SHA-256 Hashes SHA3-512 Hashes BLAKE3 Hashes

Utilities

File Hash Verifier Verify local files against published checksums. Hash Compare Compare expected and actual digest values. Multi Hash Generator Generate common hashes from one input.

Guides

Algorithm Comparison Guide Choose the right primitive for each task. Hash Test Vectors Compare known outputs across common algorithms.

Implementation Notes

Practical usage details for this browser-based SHA3-256 tool.

How to Generate a SHA3-256 hash

  1. Choose UTF-8, Hex, Base64, or File input mode.
  2. Enter text, encoded bytes, or choose a local file to process.
  3. Adjust the SHA3-256 options if your use case requires non-default settings.
  4. Click Generate SHA3-256 Hash and copy the result.

Example Input and Output

Sample input:

abc

Sample output:

3a985da74fe225b2045c172d6bd390bd855f086e3e9d525b46bfe24511431532

When Not to Use SHA3-256

  • Do not use a plain hash or derivation output directly as password storage without the right password-hashing construction and parameters.

Recommended Alternatives

Review related tools when you need a different output size, security margin, or keyed construction.

Frequently Asked Questions