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Whirlpool Hash Code Calculator

Published: February 10, 2025 at 4:45:56 PM UTC

Hash code calculator that uses the Whirlpool hash function to calculate a hash code based on text input or file upload.

The Whirlpool hash function is a cryptographic hash function designed by Vincent Rijmen (one of the co-designers of AES) and Paulo S. L. M. Barreto. It was first introduced in 2000 and later revised in 2003 to improve security. Whirlpool is part of the ISO/IEC 10118-3 standard, making it suitable for a wide range of cryptographic applications. It generates a 512 bit (64 byte) hash code, typically represented as 128 hexadecimal characters.

Full disclosure: I did not write the specific implementation of the hash function used on this page. It is a standard function included with the PHP programming language. I only made the web interface to make it publicly available here for convenience.


Calculate New Hash Code

Data submitted or files uploaded through this form will only be kept on the server for as long as it takes to generate the requested hash code. It will be deleted immediately before the result is returned to your browser.

Input data:



Submitted text is UTF-8 encoded. Since hash functions operate on binary data, the result will be different than if the text was in another encoding. If you need to calculate a hash of a text in a specific encoding, you should upload a file instead.



About the Whirlpool Hash Algorithm

I'm not a mathematician nor a cryptographer, so I'll try to explain how this hash function works in layman's terms. If you prefer the scientifically precise, mathematics-heavy explanation, I'm sure you can find that on other websites ;-)

Anyway, imagine you’re making a smoothie with all sorts of ingredients: bananas, strawberries, spinach, peanut butter, etc. Here's what Whirlpool does to your ingredients (or data):

Step 1 - Chop Everything Up (Breaking the Data Into Pieces)

  • First, it breaks your data into small chunks, like slicing fruits before blending.

Step 2 - Blend Like Crazy (Mixing It Up)

Now, it puts these chunks into a powerful blender with 10 different speeds (called "rounds"). Each round mixes the data in a different way:

  • Swap and Flip (Substitution): Some pieces are swapped out for others, like changing a strawberry with a blueberry.
  • Stir in Circles (Permutation): It spins the mixture around, shifting ingredients from one place to another so nothing stays in its original spot.
  • Mash Everything Together (Mixing): It smashes and stirs to spread the flavors (or data) evenly throughout the mixture.
  • Add a Secret Ingredient (Key Mixing): It sprinkles in a "secret ingredient" (a special code) to make the smoothie unique.

Step 3 - Final Result (The Hash)

  • After 10 rounds of intense blending, you get a smooth, perfectly mixed drink - or in this case, a 512-bit hash. There’s no way to pull out the original bananas or spinach from the smoothie anymore. All you have is the final drink.

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Mikkel Christensen

About the Author

Mikkel Christensen
Mikkel is the creator and owner of miklix.com. He has over 20 years experience as a professional computer programmer/software developer and is currently employed full-time for a large European IT corporation. When not blogging, he spends his spare time on a vast array of interests, hobbies, and activities, which may to some extent be reflected in the variety of topics covered on this website.