About the SHA-2 Hash Generator
What is the SHA-2 family?
SHA-2 is the family of hash functions that secures most of the modern internet. This tool generates all four common members from one place: SHA-224, SHA-256, SHA-384 and SHA-512. Pick an algorithm from the dropdown and the fingerprint updates instantly. They differ mainly in output length; SHA-256 is the most widely used.
The whole SHA-2 family was designed by the NSA and standardized by NIST, and it has no known practical weaknesses, which is why it replaced the older MD5 and SHA-1. It secures TLS certificates, software signatures, blockchains and integrity checks everywhere. This tool runs on the browser's native Web Crypto API, so hashing is fast and your data never leaves your device.
How to Use This Tool
- Enter your input. Type or paste text on the Text tab, or switch to the File tab and drop in a file. The SHA-2 hash appears instantly.
- Choose the output. Switch between hexadecimal and Base64, and pick upper or lowercase hex. Use the Algorithm dropdown to switch between SHA-224, 256, 384 and 512.
- Verify a checksum. Paste a hash you were given into the compare box and the tool tells you instantly whether it matches.
- Copy the result. One click copies the SHA-2 hash to your clipboard.
Common Use Cases
- Choosing the right digest size: switch between 224, 256, 384 and 512 bits without leaving the page.
- File and download integrity: verify a file against any published SHA-2 checksum.
- Certificates and signatures: SHA-2 underpins modern TLS and code signing.
- HMAC signing: keyed authentication for APIs and webhooks; enable HMAC mode and add the key.
Frequently Asked Questions
What is the difference between the SHA-2 variants?
They share the same design but produce different lengths: SHA-224 and SHA-256 use 32-bit operations and output 224 or 256 bits; SHA-384 and SHA-512 use 64-bit operations and output 384 or 512 bits. SHA-384 and SHA-512 are often faster on 64-bit hardware. SHA-256 is the most widely used default.
Which SHA-2 algorithm should I use?
SHA-256 is the safe default and the most broadly supported. Choose SHA-384 or SHA-512 when you want a larger security margin or a specification requires it, and SHA-224 when something specifically asks for a 224-bit digest.
Is SHA-2 secure?
Yes. The SHA-2 family has no known practical collision or preimage attacks and is the recommended standard for cryptographic hashing. It is not the right choice for password storage, where a slow hash like bcrypt or Argon2 belongs.
Is SHA-2 the same as SHA-256?
SHA-256 is one member of the SHA-2 family. People often say "SHA-2" when they mean SHA-256 because it is by far the most common, but SHA-2 also includes SHA-224, SHA-384 and SHA-512.
Can SHA-2 hashes be reversed?
No. Every SHA-2 variant is a one-way function; there is no way to recover the input from the output short of guessing, which is infeasible for anything with real entropy.
Can I hash a file with SHA-2?
Yes. Use the File tab, pick your algorithm, and drop in any file. It is hashed locally in your browser and matches the corresponding command-line tool.