SHA3-256 Hash Generator
Generate SHA3-256 hashes using the Keccak sponge construction. The latest NIST standard, independent from SHA-2.
SHA3-256 Hash
64 hex characters (256 bits)Enter text and click Generate to create a SHA3-256 hash
File SHA3-256 Hash
Drop a file here or click to select
Max 50 MB
Select or drag a file above to compute its SHA3-256 checksum. Processing happens entirely in your browser when possible.
Other Hash Algorithms
What is SHA3-256?
SHA-3 (Secure Hash Algorithm 3) is the latest member of the Secure Hash Algorithm family, standardized by NIST in 2015. Based on the Keccak algorithm, it uses a fundamentally different construction (sponge) than SHA-2, providing algorithmic diversity. SHA3-256 produces a 256-bit hash value.
How SHA3-256 Works
SHA-3 uses a sponge construction with a 1600-bit state (a 5×5 matrix of 64-bit words). Data is absorbed into the state through XOR operations, then squeezed out. The permutation function Keccak-f[1600] applies 24 rounds of five operations: θ (theta), ρ (rho), π (pi), χ (chi), and ι (iota).
Output
64 hex characters (256 bits)
Year
2015
Status
✓ Secure
Common Use Cases
- Post-quantum security hedging
- Ethereum (Keccak-256, a SHA-3 variant)
- Diversifying hash function dependencies
- Random number generation (sponge-based PRNG)
- Future-proof cryptographic applications
Security Considerations
SHA3-256 provides full 256-bit security with 128 bits of collision resistance. Its sponge construction is fundamentally different from SHA-2's Merkle-Damgård construction, meaning an attack on SHA-2 would not affect SHA-3. This makes SHA-3 an ideal backup hash function.
SHA3-256 vs Other Algorithms
SHA3-256 provides equivalent security to SHA-256 but is typically 2-3x slower in software implementations. Hardware implementations can be very efficient. The key advantage is algorithmic diversity — if SHA-2 is ever broken, SHA-3 remains secure. Ethereum uses Keccak-256, a pre-standardization variant of SHA-3.