Toolbench
Tools Calculators

SHA-256 hash generator

Hash text or a local file with SHA-256 (Web Crypto). Hex digest stays on your device.

Hash

Ready

How it works

SHA-256 is a 256-bit cryptographic hash. Same input → same digest; small input changes → large digest changes.

This page uses crypto.subtle.digest('SHA-256', …) in your browser. Text is encoded as UTF-8. Files are read with File.arrayBuffer() and never uploaded.

Hashing is not encryption. Do not treat a hash of a password as safe storage without a proper password-hashing scheme (salt + slow KDF).

Examples

text: Toolbench
sha256:  (run in page — depends on UTF-8 bytes)

# echo -n Toolbench | sha256sum   # compare with local CLI

FAQ

Matches sha256sum? For the same bytes, yes. Watch newlines: CLI files often end with \n; the textarea may not.

SHA-1 / MD5? Not on this page. Prefer SHA-256 for new work.

File size limits? Bound by browser memory. Very large files may be slow or fail.

Is this mining or signing? No — digest only, no network.

HMAC? Not included. This is raw SHA-256 of the message bytes.

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