100% Client-Side

SHA-3 Hash Generator

Free online SHA-3 (Keccak) hash generator. Generate SHA-3 256-bit or 512-bit hashes from any text directly in your browser. — runs 100% in your browser, client-side only. No data is sent to any server. Free to use, no account required.

Free Client-Side No Login No Storage
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SHA-256 Hash Generator Generate SHA-256 cryptographic hashes instantly — Hex or Base64 output SHA-512 Hash Generator Generate SHA-512 cryptographic hashes — stronger than SHA-256 MD5 Hash Generator Generate MD5 checksums — fast, widely supported, not for passwords

How to Use the SHA-3 Hash Generator

  1. Enter or paste text into the input field.
  2. Select the bit length (224, 256, 384, or 512).
  3. Choose Hex or Base64 output format.
  4. Click Generate Hash to compute the SHA-3 digest.

SHA-3 (Keccak) is the newest member of the Secure Hash Algorithm family. It provides an alternative to SHA-2 with a completely different internal structure, offering defence-in-depth against future cryptanalytic advances.

What is SHA-3 Hash Generator?

SHA-3 (Secure Hash Algorithm 3) is the newest SHA standard, based on the Keccak algorithm. It uses a completely different construction (sponge function) than SHA-2, providing an alternative if SHA-2 were ever broken.

Why Use This Tool

SHA-3 provides algorithmic diversity. If a weakness were found in SHA-2's Merkle-Damgård construction, SHA-3's sponge construction offers a secure fallback. It's also used in Ethereum.

When to Use It

Use SHA-3 when systems specifically require it (Ethereum uses Keccak-256), when you need algorithmic diversity from SHA-2, or for future-proofing cryptographic designs.

Common Uses

  • Ethereum/Web3 applications (Keccak-256)
  • Systems requiring SHA-3
  • Cryptographic algorithm diversity

Frequently Asked Questions

Is SHA-3 better than SHA-256?

Both are secure. SHA-3 uses a different construction (sponge vs Merkle-Damgård), providing diversity. SHA-256 is faster in software; SHA-3 resists length extension attacks naturally.

What's Keccak vs SHA-3?

Keccak won the SHA-3 competition but NIST made small parameter changes for the final SHA-3 standard. Ethereum uses original Keccak-256, not NIST SHA-3-256.

Should I switch from SHA-256?

Not necessarily. SHA-256 remains secure with no known weaknesses. SHA-3 provides an alternative if that changes. Use whichever your system requires.