Crackstation is a free service that supports MD2, MD5, NTLM, and SHA1 cracking. It uses its own word list and lookup tables to effectively perform a plaintext search of a hash from its database:

  1. We visit the website
  1. We paste the hash that we want to crack and fill in the CAPTCHA:
  1. We will see the plaintext if the hash is found; else, we see a message that says the hash was not found:
  1. Crackstation ...

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