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SHA-256 checksums without uploading the payload

Paste text; get 64-hex SHA-256. Good default for integrity checks you run yourself.

chars: 10
Input
Output

When to use

Verifying downloads you already have as text, or building doc examples — still not a password KDF.

Examples

Input
abc
Output
(NIST-style SHA-256 vector)
Empty string and abc are common test vectors.

How it works

crypto.subtle.digest('SHA-256') → hex/Base64 toggle.

Common pitfalls

  • Hashing ≠ encryption; digests are one-way but unsalted passwords are still unsafe.
  • File hashing needs the same bytes (line endings!).
  • HMAC is a different construction.

How this differs

Stronger than MD5/SHA-1 for checksums. UUID/random tools generate IDs, not content hashes.

FAQ

Is hashing encryption?
No.
Password storage?
Still no — use dedicated KDFs.
HMAC?
Out of scope unless a separate control exists.
Related?
SHA-1 / MD5 legacy pages.

Related tools

Runs in your browser. Nothing is uploaded. Not a security product —hashes and JWT decode are for debugging, not password storage or auth advice.