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SHA-224 Hash Generator — Compute SHA-224 Hashes

A 56-character SHA-2 hash for constrained systems — truncated from SHA-256 where a smaller output is enough.

Result

Hash chaining feeds each digest back in as the next input: H(H(…H(input))). Bitcoin uses double SHA-256 (2). This is not a password KDF — use PBKDF2, bcrypt, or scrypt for passwords.

What is SHA-224 Hash?

SHA-224 produces a 56-character hash by truncating SHA-256 to 224 bits — a good fit for constrained devices and legacy protocols that need a smaller output from the trusted SHA-2 family.

Deterministic — the same input always produces the same hash.
Avalanche effect — changing a single bit of input flips roughly half the output bits.
Preimage resistant — you can't reverse the hash to recover the original input.
NIST approved — defined in FIPS 180-4 alongside the rest of the SHA-2 family.
Truncated SHA-256 — uses the same compression function as SHA-256 but outputs only the leftmost 224 bits.
Legacy protocols — still found in older TLS configurations, X.509 certificate chains, and legacy cryptographic systems.

Zero-Server Tool Data Guarantee

All hashing happens locally in your browser. Your input is never sent to any server.

How to Use

01

Enter Your Text

Type or paste the text you want to hash into the input area.

02

View the Hash

The SHA-224 hash is computed instantly as you type. It is displayed as a 56-character hex string.

03

Verify a Checksum

Switch to the Verify tab and paste a published checksum — sha224sum-style output works too — to confirm it matches the hash of your input.

04

Copy the Result

Use the copy button to save the hash to your clipboard.

Common Use Cases

Certificate Chains

SHA-224 is used in X.509 certificate chains and legacy TLS configurations for lightweight signature verification.

Legacy Protocol Compatibility

Maintain interoperability with older cryptographic systems that specify SHA-224 in their protocols.

Backward Compatibility

Verify digests created by older systems that selected SHA-224 before SHA-256 became the default.

Lightweight Checksums

Use SHA-224 when 224-bit output is sufficient and you want a smaller hash than SHA-256 for bandwidth or storage savings.

Implementation Examples

JavaScriptBrowser (Web Crypto API)
async function sha224(message) {
    const msgBuffer = new TextEncoder().encode(message);
    const hashBuffer = await crypto.subtle.digest('SHA-224', msgBuffer);
    const hashArray = Array.from(new Uint8Array(hashBuffer));
    return hashArray.map(b => b.toString(16).padStart(2, '0')).join('');
}


const hash = await sha224('hello world');
// "ea09ae889d5b7864a899db723534320c3d48168f8db8c02f71d5e845"

SHA-224 vs SHA-256 vs SHA-384

PropertySHA-224SHA-256SHA-384
Output size224-bit (56 hex)256-bit (64 hex)384-bit (96 hex)
Security level112-bit (unbroken)128-bit (unbroken)192-bit (unbroken)
Use caseLegacy compatibilityGeneral purposeHigh-security applications
Use for passwords?No (too fast)No (too fast)No (too fast)
Current recommendationCompatibility onlyRecommendedRecommended
NIST approved?YesYesYes

Which SHA-2 Size?

SHA-2 sizeOutputCollision resistanceBest for
SHA-224You're here56 hex112-bitLegacy compatibility, compact checksums on constrained systems
SHA-25664 hex128-bitGeneral purpose — file integrity, TLS, signatures, blockchain
SHA-512128 hex256-bitMaximum security margin, high-assurance certificates
SHA-512/25664 hex128-bitSHA-256's size with SHA-512's speed — length-extension resistant

All SHA-2 sizes use the Merkle-Damgård construction from NIST FIPS 180-4. SHA-224 truncates SHA-256's output, and SHA-512/256 truncates SHA-512's — which is what gives it length-extension resistance.

Production Best Practices & Security

Don't use SHA-224 for passwords — like all SHA-2 variants, it's too fast; use bcrypt, scrypt, or PBKDF2 instead. Why:SHA-224 is optimized for performance, not security against brute-force. An attacker can use a GPU to try billions of guesses per second, making short passwords easy to crack.
Use a salt for uniqueness — without a salt, identical inputs produce identical hashes, enabling rainbow table attacks. Why:Salting ensures that even if two users have the same password, their hashes will be different. This prevents attackers from using precomputed tables to crack millions of hashes at once.
Prefer SHA-256 for new projects — SHA-224 is mostly for compatibility with existing systems; SHA-256 offers a stronger security margin. Why:SHA-256 is the industry standard with more widespread support and a larger output size, providing better protection against potential future cryptographic breakthroughs.
SHA-224 is for compatibility — use it when a protocol or legacy system requires a 224-bit digest. Why:Some older certificate and protocol ecosystems still specify 224-bit hashes. In these cases, using SHA-224 ensures your system can interoperate with those legacy endpoints.
Verify integrity end-to-end — compute the hash at the source and verify it at the destination to detect tampering. Why:Comparing hashes is the most reliable way to ensure a file wasn't altered in transit. If even one bit changes, the resulting hash will be completely different.
Consider SHA-3 for future-proofing — if you're designing new protocols, SHA-3-224 provides an independent security alternative. Why:SHA-3 uses a different mathematical construction (sponge) than SHA-2, making it resistant to attacks that might eventually affect the SHA-2 family.

Frequently Asked Questions

SHA-224 appears in three main contexts:

  • Legacy TLS 1.2 cipher suites — a small number of older suites use SHA-224 for handshake message authentication
  • Constrained PKI and smart-card systems — some legacy certificate and smart-card ecosystems still specify a 224-bit digest
  • Government and financial protocols (smart card standards, ICAO machine-readable travel documents) where a 224-bit output is mandated

For new projects, prefer SHA-256 (128-bit collision security) or SHA3-256 (post-quantum readiness). SHA-224 is primarily useful for backward compatibility.