Can a SHA-256 hash be reversed?

No — it's a one-way function. The only 'reversal' is guessing inputs and comparing hashes, which is why weak passwords still get cracked.

Is my text uploaded when hashing?

No. The digest is computed in your browser with the Web Crypto API.

How to generate a SHA-256 hash

A SHA-256 hash is a 64-character fingerprint of your input: same input, same hash, every time — but no way back. Generating one takes a paste and a click.

Open Hash Generator

Steps

Open the hash generator and paste or type your text.
Pick SHA-256 (or SHA-1/MD5 if a legacy system demands it).
Copy the hex digest — computed locally, your input is never uploaded.

Which algorithm to choose

Algorithm	Output	Status
SHA-256	64 hex chars	Current standard — use this
SHA-512	128 hex chars	Stronger variant, longer output
SHA-1	40 hex chars	Broken for security; legacy checksums only
MD5	32 hex chars	Broken; only for non-security checksums

One thing hashes are not

Hashing is not encryption — there's no key and no decryption. And for storing passwords, plain SHA-256 is the wrong tool: password storage needs a slow, salted algorithm like bcrypt or Argon2. Use SHA-256 for integrity checks, deduplication, cache keys and content fingerprints.

Tools used in this guide

Hash GeneratorSHA-1, SHA-256, SHA-384 & SHA-512 Base64 EncoderEncode text or files to Base64 UUID GeneratorGenerate UUIDs in bulk