Free MD5 Hash Generator

No, MD5 is completely insecure for passwords. It is fast (allowing rapid brute force), has no salt, and collision attacks are practical. Use bcrypt, scrypt, or Argon2 for passwords.

MD5 remains useful for non-security purposes like checksums, cache keys, and data fingerprinting. For these uses, collision resistance is not critical. It is fast and produces compact hashes.

No, hashing is one-way and cannot be reversed. However, common passwords can be looked up in rainbow tables or cracked by brute force, which is why MD5 is unsafe for passwords.

This is called the avalanche effect - a desired property of hash functions. It means you cannot determine the original input from the hash, and similar inputs do not produce similar hashes.

A collision is when two different inputs produce the same MD5 hash. Researchers can now create collisions deliberately, making MD5 unsuitable for security where uniqueness matters.

MD5 produces a 128-bit hash, typically displayed as a 32-character hexadecimal string. It is always the same length regardless of input size.