Hash Generator — MD5, SHA256 & SHA-512

No — MD5, like every hash function, is one-way by design. Sites offering 'MD5 decrypt' or 'dehash' simply look the value up in giant precomputed tables of common inputs; a unique or salted input cannot be recovered. That is also why passwords should be stored with slow, salted algorithms like bcrypt or Argon2, never plain MD5. To check whether a value matches a hash, use this tool's verification mode instead.

Usually by length: 32 hex characters = MD5, 40 = SHA-1, 64 = SHA-256, 96 = SHA-384, 128 = SHA-512. Paste your text here and all five hashes are computed side by side, so you can compare against the one you have.

A hash (or digest) is a fixed-length string produced by a hash function from any input. The same input always produces the same hash, but it is computationally infeasible to reverse a hash back to its original input. Even a tiny change in input produces a completely different hash — the avalanche effect.

MD5 produces a 32-character hash. It is no longer considered secure for cryptographic purposes (collisions have been found), but it is still widely used for checksums, file integrity verification and non-security data fingerprinting.

SHA-256 is part of the SHA-2 family and produces a 64-character hash. It is the industry standard for security applications including SSL certificates, Bitcoin and digital signatures. No practical collision attacks have been found against SHA-256.

SHA-512 produces a 128-character hash and is part of the SHA-2 family. It provides even stronger security than SHA-256 and is preferred in high-security contexts. On 64-bit processors it is actually faster than SHA-256.

No — hash functions are one-way by design. You cannot derive the original input from a hash. Attackers can compare hashes against precomputed dictionaries (rainbow tables), which is why salting passwords before hashing is essential.