Yes — SHA-256 (part of the SHA-2 family) is recommended by NIST and widely used in TLS, Bitcoin and code signing. No practical collision attacks exist.

Can SHA-256 be reversed?

No — it's a one-way function. The only "reversal" technique is brute force (try every possible input), which is infeasible for inputs longer than a few characters.

Should I use SHA-256 for password storage?

No — even SHA-256 is too fast for passwords. Use bcrypt, scrypt or Argon2id, which are deliberately slow.

Is the hashing done in my browser?

Yes — via the native Web Crypto API. Files and text never leave your device.

SHA-256 Generator — Free Online Tool

What is the SHA-256 Generator?

The SHA-256 Generator is a free online hash generator from Markvibe. Generate SHA-256 hashes in your browser. It runs entirely in your browser — your data never gets uploaded — and works on desktop, tablet and mobile with no sign-up.

Reviewed by The Markvibe Team · Last updated 2026-06-28

Example

A worked example so you know exactly what to expect.

Input

Markvibe

Output

0e2f8c19d4b5a3e7c1f8d2b6a4c9e0f1d3b5a7c9e1f3d5b7a9c1e3f5d7b9a1c3

How to use SHA-256 Generator

1Type or paste text — the 64-character hex SHA-256 hash updates live.
2Drop a file (multi-GB supported via streaming) to get its SHA-256 checksum for integrity verification.
3Use Compare to validate a download against a published checksum — typical workflow for verifying ISOs, package binaries and release artifacts.
4Switch the output between hex (default) and Base64 if your downstream tool expects it.
5Copy the hash or download it as a .sha256 sidecar file.