About the SHA-224 Hash Generator
SHA-224 is a truncated form of SHA-256 with a different initial value, producing 56 hexadecimal characters. It exists mainly for compatibility with systems that specify a 224-bit digest, such as certain DSA parameter sets, where the shorter length matches the key size.
That different starting constant is the whole point of the design. Were SHA-224 simply the first 56 hex characters of a SHA-256 digest, anyone holding the SHA-256 value would hold the SHA-224 one for free, and the two functions would leak into each other wherever a system used both. Starting from different constants makes them independent functions that merely share a compression step, so sha224("abc") is not a prefix of sha256("abc") and no comparison between them means anything.
You will run into a 224-bit requirement alongside 112-bit symmetric strength targets, in certain DSA and ECDSA parameter sets, and occasionally in constrained protocols counting every byte on the wire. Outside those, reach for SHA-256. It shares SHA-256's security properties and speed, so it is suitable as a checksum but not for password storage. This tool computes it locally from your text's UTF-8 bytes, with hex or Base64 output. If you have been handed a 56-character digest and are not sure what made it, the Hash Identifier narrows the field by length.
How to use
- Paste text.
- Choose the output format.
- Copy the SHA-224 hash.
Common questions
- Why use SHA-224 over SHA-256?
- Only for compatibility with a system that specifies 224 bits. Otherwise SHA-256 is the more common choice.
- Is it as secure as SHA-256?
- It shares the same construction; the shorter output slightly reduces the security margin but no practical attack exists.
- What length is the hash?
- 224 bits, or 56 hexadecimal characters.