SHA-3 Hash
SHA3-224/256/384/512 hashes in your browser.
How to use
- 1 Choose a SHA-3 variant (224, 256, 384 or 512).
- 2 Type or paste the text you want to hash.
- 3 Read the hexadecimal digest that updates live below.
- 4 Copy the digest with the Copy button.
About SHA-3 Hash
The SHA-3 Hash tool computes FIPS 202 SHA-3 digests of any text directly in your browser.
SHA-3, based on the Keccak sponge construction, is the newest member of the Secure Hash Algorithm family and was standardised by NIST as a structurally different alternative to SHA-2.
It is useful for content fingerprinting, integrity checks, deduplication keys and any situation where you want a modern, collision-resistant hash.
You can pick from all four standard output sizes: SHA3-224, SHA3-256, SHA3-384 and SHA3-512.
Type or paste your text, choose a variant, and the lowercase hexadecimal digest updates instantly, along with its size in bytes and bits so you can sanity-check the output.
Because browsers ship Web Crypto with SHA-1 and SHA-2 but not SHA-3, this tool includes a self-contained implementation of the Keccak-f[1600] permutation and sponge — no libraries, no network requests.
Everything is computed locally, so your input never leaves the page.
That makes it safe for hashing private strings, secrets or document contents, and it keeps working offline once loaded.
The output is verified against the official NIST known-answer test vectors for correctness.
FAQ
How is SHA-3 different from SHA-256?
SHA-256 is part of SHA-2, built on the Merkle–Damgård construction. SHA-3 uses the unrelated Keccak sponge design, giving a different security foundation while serving similar purposes.
Is the hashing done on a server?
No. The Keccak algorithm runs entirely in your browser with JavaScript, so your input is never uploaded or stored anywhere.
Are these results standard-compliant?
Yes. The output matches the official FIPS 202 / NIST known-answer test vectors for SHA3-224, 256, 384 and 512.