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SHA3-256 Hash Generator

Generate SHA3-256 hashes — the most commonly used SHA-3 variant — directly in your browser.

SHA3-256256-bitKeccakBrowser based

Last updated: May 30, 2026

Client-Side Processing
Input Data Stays on Device
Instant Local Execution
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What is SHA3-256 Hash Generator?

SHA3-256 is the most widely used member of the SHA-3 family, standardised in FIPS 202. It uses the Keccak[512] sponge with a 1088-bit rate and produces a 256-bit output.

SHA-3 was designed as an alternative to SHA-2 with a fundamentally different internal structure (the Keccak sponge). SHA3-256 and SHA-256 produce the same output length but are not interchangeable — they produce entirely different digests.

How to Use SHA3-256 Hash Generator

1

Type or paste the text you want to hash

2

Review the generated SHA3-256 output

3

Toggle uppercase if your target system expects capital hex

4

Copy the digest for comparison or storage

Common Use Cases

  • Hashing data with a SHA-3 compliant algorithm.
  • Verifying SHA3-256 output against reference implementations.
  • Generating SHA3-256 fixtures for unit tests.
  • Comparing SHA3-256 with SHA-256 for the same input.

Example Input and Output

Generate the FIPS 202 SHA3-256 digest for a short string.

Input text
abc
SHA3-256 hash
3a985da74fe225b2045c172d6bd390bd855f086e3e9d525b46bfe24511431532

How This Tool Works

The tool encodes input as UTF-8 bytes, applies Keccak-f[1600] with SHA3-256 rate and SHA3 multi-rate padding locally, and formats the 256-bit digest as hexadecimal.

Technical Stack

TypeScriptSHA3-256Keccak-f[1600]UTF-8 TextEncoderClient-side hashing

Variant

FIPS 202 SHA3-256 — Keccak[512], rate=1088 bits, capacity=512 bits.

Security note

SHA3-256 is fully secure and is the recommended SHA-3 variant for general use.

Frequently Asked Questions

How long is a SHA3-256 hash?

SHA3-256 outputs 256 bits, displayed as 64 hexadecimal characters.

Is SHA3-256 the same as SHA-256?

No. Both produce 256-bit outputs, but they use completely different algorithms and produce different digests from the same input.

Should I use SHA3-256 or SHA-256?

Either is secure. SHA-256 is more widely deployed; SHA3-256 is preferred when structural independence from SHA-2 is required.

Is input uploaded?

No. Hashing runs entirely in your browser.

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