SHA Hash Generator

How to use it

1. 1Paste the text you want to hash.
2. 2Pick an algorithm — SHA-256 is the right default unless something specific requires otherwise.
3. 3The hash appears immediately; copy it with the button beside it.
4. 4Change a single character and watch the whole hash change — that is the property checksums rely on.
5. 5Use SHA-1 only to match a legacy system. It is broken for security purposes and labelled as such.

Frequently asked questions

Why is MD5 not offered?

Because it is broken. Collisions can be produced on a laptop in seconds, so it is unfit for signatures, integrity checks and certificates. SHA-1 is included only for legacy compatibility.

Can a hash be reversed?

Not directly — it is one-way. But short or common inputs can be found by brute force or a lookup table, which is why passwords must be hashed with a slow, salted algorithm like bcrypt or Argon2 instead.

Is my text uploaded to hash it?

No. Hashing uses the browser's built-in Web Crypto API and happens on your device. You can verify it with the network tab open.

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