SHA3-512 is the largest SHA-3 variant (FIPS 202), producing 512-bit hashes via the Keccak sponge. With 256-bit security, it provides NIST's highest hash security level.

SHA3-512 vs SHA-512: tradeoffs?

SHA3-512 offers structural immunity to length-extension attacks and independence from SHA-2. SHA-512 has better performance and wider ecosystem support.

When to choose SHA3-512?

When you need: (1) NIST's highest hash security, (2) length-extension protection without HMAC, (3) cryptographic diversity, or (4) compliance with standards preferring SHA-3.

Any known weaknesses?

No. SHA3-512 has undergone extensive cryptanalysis since Keccak won the SHA-3 competition in 2012. No practical attacks have been discovered.

Is SHA3-512 used in major systems?

Growing adoption in new cryptographic protocols, blockchain projects seeking post-quantum readiness, and NIST-compliant government systems.

Tools

SHA3-512|128 hex chars

Input

Output

Hash result will appear here...

0 chars|0 bytes

SHA3-512 Hash Calculator — Maximum Keccak Sponge Output

The largest SHA-3 variant at 512 bits. Keccak-based, NIST-recommended as a cryptographically independent alternative to SHA-512.

Features

✓Compute SHA3-512 hashes online — the largest Keccak sponge output at 512 bits
✓Real-time 512-bit hash computation with 128 hex character output
✓One-click copy, download as .txt, and uppercase/lowercase toggle
✓NIST-recommended alternative to SHA-512 for cryptographic diversity
✓Hash verification against known SHA3-512 checksums
✓100% browser-based — no data sent to any server

How to Use

1Type or paste your text into the input box above.
2Your hash digest appears instantly — no page reload needed.
3Toggle UPPERCASE / lowercase to change the hex output format.
4Click the copy icon to copy the hash to clipboard, or use Download to save as .txt.
5Paste an expected hash into the Verify field to check for a match.

Frequently Asked Questions

Related Tools

SHA3-256 Hash Calculator — NIST 3rd Gen Keccak Standard

NIST third-generation hash standard with 256-bit output. Built on the Keccak sponge — shares zero code with SHA-2, providing cryptographic diversity for critical systems.

SHA-512 Hash Calculator — 512-bit Maximum Security

The highest-output SHA-2 variant at 512 bits. Paradoxically faster than SHA-256 on 64-bit CPUs. 256-bit security level for long-term data protection.