How it works
How to use the SHA-2 Hash Generator
Paste or open your input
Type, paste or drop a file into the left editor — or press Sample to try it.
Adjust the options
Use the options in the toolbar; the result updates as you type.
Copy or download the result
Copy the output or download it as a file.
About the SHA-2 Hash Generator
SHA-2 is the family of secure hash functions standardized by NIST in FIPS 180-4: SHA-224, SHA-256, SHA-384, SHA-512, SHA-512/224 and SHA-512/256. This page computes SHA-256, the most common member; use the links below for the other sizes.
Which SHA-2 variant should I use?
Use SHA-256 unless a protocol requires otherwise. SHA-512 and SHA-512/256 are faster on 64-bit machines, and SHA-384 is required by some TLS and government profiles.
Built for developers
Why developers use it
Private by design
Runs 100% in your browser. Nothing you paste is uploaded, logged or stored on a server.
Instant results
Output updates as you type, with precise error locations when something is wrong.
Works offline
Once loaded, the tool keeps working without a connection. Install it as an app if you like.
Free, no sign-up
No accounts, no limits, no watermarks.
FAQ
Frequently asked questions
Can a hash be reversed to get the original text?
No. Hash functions are one-way: the only way to “reverse” one is to guess inputs until one matches, which is why short or common inputs can be looked up in precomputed tables. Never use a plain hash to store passwords — use bcrypt, scrypt or Argon2.
Why does the same input always give the same hash?
Hash functions are deterministic. Changing a single character produces a completely different digest (the avalanche effect), which makes hashes ideal for checksums, cache keys and integrity checks.
Is my data uploaded anywhere?
No. Everything runs locally in your browser — nothing you type, paste or open is sent to a server, logged or stored. The tool keeps working offline once the page has loaded.
Keep going
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