Hash Cracker — MD5, SHA-1 & SHA-256

Paste a hash below. We detect whether it's MD5, SHA-1 or SHA-256 from its length and check it against our own cracked-hash database — no sign-up, no external services, instant answer.

How does this hash cracker work?

MD5, SHA-1 and SHA-256 are one-way hash functions: given a piece of text, they always produce the same fixed-length fingerprint, but there is no mathematical way to go back from the fingerprint to the original text. "Cracking" a hash online does not reverse the math — it looks the hash up in a precomputed table of hash → plaintext pairs built from common passwords, words and phrases. If your original text was random and not a common password or word, no cracker (here or anywhere else) can recover it, which is exactly why it's a good password.

Want to know more? Read our explanation of MD5 hashes and why they shouldn't be used for passwords in new systems, or generate a hash from your own text.