MD4 Hash Generator
Use this tool to generate MD4 hashes directly in your browser. MD4 is a legacy cryptographic hash algorithm designed in 1990 that produces a 128-bit (32 hexadecimal character) digest.
All hashing is performed strictly client-side. Your inputs are never transmitted to a remote server, making this tool a private way to generate exact digests for legacy comparisons or historical test vectors.
Legacy compatibility
MD4 is cryptographically broken and is no longer suitable for any modern security workflow, such as password storage or digital signatures.
However, you may still need to generate MD4 digests when interacting with legacy systems, debugging historical compatibility issues, or working with extremely old network protocols that hard-coded the MD4 algorithm.
Batch processing
Paste multiple lines of text to hash them simultaneously. By selecting the “Batch by newline” option, the tool processes each line individually and returns a list of corresponding 32-character digests.
Use the “Trim lines” option to automatically strip invisible leading or trailing whitespace. This is a common source of mismatch errors when copying strings from older databases or text files.
Encodings and variants
Like all hash functions, MD4 relies on exact byte inputs. If you hash a string with slight capitalization changes or an added space, the entire digest will change.
Enable “Normalize Unicode” to standardize the internal encoding of special characters. This ensures that visually identical input strings map to the same binary payload before hashing, ensuring stable output across different platforms.