What is SHA256?
SHA-256 is a cryptographic hash function that produces a fixed 256-bit (64 hex character) digest from any input. It is a one-way function — practically impossible to reverse — and is widely used for data integrity checks, digital signatures, and password hashing (usually combined with a salt and a slow key-derivation step).
Example
SHA-256 of "hello" is 2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824.
Related tool
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