SHA-256 Checksum Generator

SHA-256 creates a fixed-length fingerprint of text. Developers use it to compare payloads, verify copied data, document checksums, create deterministic cache keys, and confirm that two inputs are exactly the same. Even a one-character change creates a completely different hash.

This tool uses the browser Web Crypto API to generate the SHA-256 digest locally. It is useful for quick integrity checks, API debugging, webhook samples, build notes, and documentation. SHA-256 is a hash function, not encryption; the output cannot be decoded back into the original input.

For password storage, use password hashing algorithms such as Argon2, bcrypt, or scrypt. SHA-256 is fast, which is good for checksums but not enough by itself for storing passwords securely.