SHA3-256
Calculate a SHA3-256 hash from text using UTF-8, Hex, Base64, and other input encodings. Read more
What is SHA3-256?
SHA3-256 is a fixed 256-bit cryptographic hash standardized in NIST FIPS 202. It belongs to the SHA-3 family and uses a different construction from SHA-256. It also uses a different domain-separation suffix from the original Keccak-256, which is common in Ethereum-related systems.
How to use this hash calculator
Enter the text, choose its input encoding, and select the result format. Select Hex input when the entered characters represent encoded bytes; otherwise the visible hexadecimal characters themselves will be hashed as text.
Result example
SHA3-256 of UTF-8 abc is 3a985da74fe225b2045c172d6bd390bd855f086e3e9d525b46bfe24511431532 in Hex. Keccak-256 produces a different value for the same bytes.
Important limitations
SHA3-256 is not encryption and an unkeyed hash does not provide authentication. Do not store passwords as plain SHA3-256 digests; password storage requires a salted, deliberately expensive password-hashing function.
Frequently asked questions
Why does my result differ from another tool?
Check whether the expected algorithm is SHA3-256, SHA-256, or Keccak-256, then verify the input bytes, encoding, and line endings.
Can I use the result to verify data?
Yes, when the expected SHA3-256 value comes from a trusted source. To process a file, use SHA3-256 File Hash.