SHA-256 Hash Generator

Runs in your browser — your data is never uploaded.

Compute the SHA-256 hash of any text — or switch to SHA-1, SHA-384 or SHA-512 — using your browser’s built-in, audited WebCrypto implementation rather than third-party JavaScript. The result is the standard lowercase hex digest. Because hashing runs entirely on your device, it’s safe to hash passwords, tokens and other secrets: they never travel anywhere.

0 characters · runs entirely in your browser

How to use SHA-256 Hash Generator

  1. 1

    Paste or type the text you want to hash.

  2. 2

    Choose the algorithm — SHA-256 is the default and right for most uses.

  3. 3

    Click “Generate hash” and copy the hex digest.

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Frequently asked questions

Is my input sent to a server?+

No. Hashing uses your browser’s native WebCrypto API (crypto.subtle) entirely on your device. That matters for hashing: the whole point is often to avoid exposing the original value.

Which algorithm should I use?+

SHA-256 for almost everything — checksums, content addressing, integrity checks. SHA-512 if you want a larger digest. SHA-1 is cryptographically broken and should only be used to match legacy systems that require it.

Why does the same text always give the same hash?+

That’s the defining property of a hash function — deterministic output. Even a one-character change produces a completely different digest, which is what makes hashes useful for verifying integrity.

Can I reverse a hash back to the original text?+

No. Cryptographic hashes are one-way. The only “reversal” is guessing inputs and comparing digests — which is why unsalted hashes of short or common strings are still vulnerable to lookup tables.

Is this suitable for storing passwords?+

A plain SHA-256 is NOT how passwords should be stored — use a slow, salted algorithm like bcrypt, scrypt or Argon2 for that. This tool is for checksums, deduplication, cache keys and debugging.

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