About SHA-224 Hash Generator
This SHA-224 hash generator computes the SHA-224 digest of your text or file. SHA-224 produces a 224-bit value, written as 56 hexadecimal characters. It is free, needs no sign-up and runs in your browser, so nothing you enter is uploaded.
SHA-224 is a member of the SHA-2 family. It runs the same algorithm as SHA-256 with different starting values and then keeps only the first 224 bits of the result. That gives a shorter digest at roughly the same speed, with 112 bits of collision resistance.
It is rarely the first choice. Most software picks SHA-256, so you will mostly see SHA-224 where a protocol or standard asks for a 224-bit digest, or where a shorter output matches a 112-bit security target. Browsers do not offer SHA-224 through Web Crypto, so this page computes it with its own code, checked against the FIPS 180 test vector for "abc".
SHA-224 is secure today. It is not vulnerable to the attacks that broke MD5 and SHA-1. Like SHA-256 it is subject to length extension if used as a naive keyed hash, so use HMAC when you need a secret key.
How to use SHA-224 Hash Generator
- Choose an algorithm from the row of buttons: MD5, SHA-1, SHA-224, SHA-256, SHA-384, SHA-512, SHA3-256, SHA3-512 or CRC32. SHA-256 is a good default.
- Choose Text and type or paste your input, or choose File and pick a file from your device. The hash updates as you type.
- Read the digest in the result box. Tick Uppercase for capital hex letters, or Base64 output to show the digest in Base64 instead of hex.
- For a keyed hash, tick HMAC with secret key and enter the key. The result is then labelled HMAC-SHA-256 (or whichever algorithm you chose).
- To verify a download or a value from documentation, paste the expected hash into Compare with a known hash. The tool says Match or No match.
- Use Copy to put the digest on your clipboard.
Features
- Nine algorithms: MD5, SHA-1, SHA-224, SHA-256, SHA-384, SHA-512, SHA3-256, SHA3-512 and CRC32.
- Hashes text as UTF-8, so accented letters, other scripts and emoji hash the same way as on a server or in a command-line tool.
- Hashes a file you choose from your device. The file is read in your browser and never uploaded.
- HMAC with a secret key for every algorithm except CRC32, following RFC 2104.
- Hex output in lowercase or uppercase, or Base64 output.
- Compare with a known hash. Case, spaces and a leading 0x are ignored, and the expected value can be hex or Base64.
- SHA-1, SHA-256, SHA-384 and SHA-512 use the Web Crypto API in your browser, which is fast and well tested.
- A warning appears when you pick MD5, SHA-1 or CRC32, because they are not safe for security purposes.
- One-click copy of the result.
Worked examples
SHA-224 of "abc" gives 23097d223405d8228642a477bda255b32aadbce4bda0b3f7e36c9da7
The FIPS 180 test vector.
SHA-224 of an empty input gives d14a028c2a3a2bc9476102bb288234c415a2b01f828ea62ac5b3e42f
SHA-224 of "The quick brown fox jumps over the lazy dog" gives 730e109bd7a8a32b1cb9d9a09aa2325d2430587ddbc0c38bad911525
Privacy: how it works
- The text, the file and the HMAC key stay in your browser tab. Nothing is sent to Ulkaa or to any other server, which you can confirm in the Network tab of your browser developer tools.
- Because the work happens on your own device, large files are limited by your browser memory rather than by an upload limit.
Tips
- To verify a download, choose File, pick the downloaded file, and paste the publisher hash into the compare box. A match means the bytes are identical to what the publisher hashed.
- Hash the same text twice with a trailing space added once. Seeing two unrelated digests is the quickest way to understand the avalanche effect.
- A hash you found on the same page as the download only protects against corruption. It cannot protect you if the page itself was altered.
- HMAC takes the key as plain text. If your key is hex or Base64, decode it first, or the result will not match another system.
Frequently asked questions
Is it really free?
Yes. There is no price, no trial and no credit card. Ulkaa Tool does the work with your own device, so there is no server bill to pass on to you.
Do I need an account?
No. There is no sign-up and no login. Open the page and use it. An Ulkaa account is not needed for anything on this tool.
Does it run in my browser?
Yes. Your text and files are processed by code running in your browser tab, on your own device.
Is my data uploaded?
No. Your text and files are never sent to Ulkaa or to anyone else. You can check this yourself by watching the Network tab in your browser developer tools while you use the tool.
What is the difference between SHA-224 and SHA-256?
They use the same process with different initial values, and SHA-224 cuts the output to 224 bits. SHA-256 has 64 hex characters and SHA-224 has 56. SHA-256 is far more widely supported.
Is SHA-224 secure?
Yes. There is no known practical attack on it. It offers 112 bits of collision resistance, which is below SHA-256, so choose SHA-256 unless you need the shorter size.
More Hash Generator pages
- Hash GeneratorHash text or a file with MD5, SHA-1, SHA-2, SHA-3 or CRC32, add an HMAC key, and check the result against a known hash.
- MD5 Hash GeneratorGet the 128-bit MD5 hash of text or a file as 32 hexadecimal characters.
- SHA-1 Hash GeneratorGet the 160-bit SHA-1 hash of text or a file as 40 hexadecimal characters.
- SHA-256 Hash GeneratorGet the 256-bit SHA-256 hash of text or a file as 64 hexadecimal characters.
- SHA-384 Hash GeneratorGet the 384-bit SHA-384 hash of text or a file as 96 hexadecimal characters.
- SHA-512 Hash GeneratorGet the 512-bit SHA-512 hash of text or a file as 128 hexadecimal characters.
- SHA3-256 Hash GeneratorGet the 256-bit SHA3-256 hash of text or a file as 64 hexadecimal characters.
- SHA3-512 Hash GeneratorGet the 512-bit SHA3-512 hash of text or a file as 128 hexadecimal characters.
- CRC32 Checksum CalculatorCalculate the 32-bit CRC32 checksum of text or a file as 8 hexadecimal characters.
- HMAC-SHA256 GeneratorSign a message with a secret key using HMAC-SHA256 and read the result as hex or Base64.
- File Checksum CalculatorHash a file on your device and compare it with the checksum the publisher gave you.