MD5 Hash Generator

MD5 (Message Digest Algorithm 5) is a widely used hash function that produces a 128-bit (16-byte) hash value, typically represented as a 32-character hex string. While no longer recommended for security-sensitive use, it is still common for checksums and non-cryptographic purposes.

Yes, completely free. No signup or account required.

All hashing runs entirely in your browser using a pure JavaScript MD5 implementation. Nothing is uploaded.

No, not for security-critical use. MD5 has known collision vulnerabilities — two different inputs can produce the same hash. Use SHA-256 or SHA-512 for passwords, signatures, and security-sensitive applications.

Not directly. MD5 is a one-way function. However, attackers can use rainbow tables or brute force to crack short or common inputs. This is why MD5 should never be used alone for password storage.

An MD5 checksum is the MD5 hash of a file or data block used to verify integrity. If the MD5 of a downloaded file matches the published checksum, the file was not corrupted or tampered with in transit.

An MD5 hash is always 128 bits (16 bytes), represented as 32 hexadecimal characters, e.g. d41d8cd98f00b204e9800998ecf8427e.

A collision is when two different inputs produce the same MD5 hash. Researchers demonstrated practical MD5 collisions in 2004, which is the main reason MD5 is considered cryptographically broken.

MD5 is still used for non-security checksums — verifying file integrity after download, deduplicating files, and generating cache keys — where collision resistance is not required.

MD5 produces a 32-character hex hash and is fast but cryptographically broken. SHA-256 produces a 64-character hex hash, is slower, and is cryptographically secure for signatures, certificates, and password hashing.