MD4 generator

Generate an MD4 hash for any string input.

Tool: Cryptographic Hash
Type: Hashing Utility

MD4 generator

Generate MD4 Hash
Enter any text to generate its MD4 hash
Key Features
  • Fast MD4 hashing
  • Standard 32-character hash
  • Handles any text length
  • One-click copy
  • No registration required

How to Use

1
Enter Text

Paste your text or password

2
Click Generate

Instant hash creation

3
Get Hash

32-character MD4 hash

4
Copy & Use

Copy to clipboard

Understanding MD4 Hashing

What is MD4?

MD4 (Message Digest Algorithm 4) is a cryptographic hash function that produces a 128-bit hash value (represented as 32 hexadecimal characters). Created by Ron Rivest in 1990, it takes any input and generates a unique fixed-length hash. Though older than MD5, it operates on similar principles.

How MD4 Works

MD4 processes input data through a series of mathematical operations, producing a unique hash. Even a single character change results in a completely different hash. It's a one-way function—you cannot reverse it to get the original input.

When to Use MD4

Use MD4 for legacy systems, checksums, and non-security contexts. It's still useful for checking if data has been corrupted or changed, particularly for backward compatibility with older systems.

Security Note

MD4 is NOT recommended for cryptographic security or password hashing. Use SHA-256, SHA-3, or bcrypt for security-critical applications. MD4 has known vulnerabilities and collision weaknesses.

Perfect For

Legacy Systems

Maintain compatibility with older systems and applications that require MD4 hashing for verification.

Data Verification

Generate unique identifiers for database records or detect duplicate content in legacy applications.

Archive Checking

Verify file integrity in older backup systems and archived data using MD4 checksums.

Cache Keys

Generate unique cache keys or content identifiers in legacy web applications and systems.

Why Choose Our Tool?

⚡
Instant Hashing

Real-time processing

🔒
Standard MD4

32-character hash

📊
Any Text Length

Handles large inputs

📋
Easy Copy

One-click copying

📱
Mobile Friendly

Works everywhere

🆓
100% Free

No registration

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Complete Guide to MD4 Hashing

What is MD4 and How Does It Work?

MD4 (Message Digest Algorithm 4) is a cryptographic hash function that produces a 128-bit hash value, typically expressed as a 32-character hexadecimal number. Created by Ronald Rivest in 1990, MD4 processes any amount of input data and generates a fixed-length hash. Even the tiniest change in the input produces a completely different hash.

Common MD4 Applications

  • Legacy System Support: Maintain compatibility with older systems requiring MD4
  • Data Deduplication: Identify duplicate content by comparing hashes
  • Archive Verification: Verify integrity of historical backup files
  • Database Checksums: Detect data corruption or changes in legacy databases
  • Cache Keys: Generate unique identifiers for caching mechanisms

MD4 Characteristics

  • Hash Length: Always produces 128-bit (32 hexadecimal character) hash
  • Deterministic: Same input always produces same hash
  • One-Way Function: Cannot reverse hash to original input
  • Fast Computation: Rapid hashing of large files or text
  • Avalanche Effect: Tiny input change produces completely different hash

MD4 vs Other Hash Algorithms

MD4 produces a 32-character hash, similar to MD5, while SHA-1 produces 40 characters, and SHA-256 produces 64 characters. MD4 is faster than MD5 but both are considered cryptographically broken. For new projects, use SHA-256, SHA-3, or bcrypt. MD4 remains useful only for legacy systems that specifically require it.

Security Considerations

MD4 has known cryptographic weaknesses and should NOT be used for password storage or security-critical applications. Collision attacks are possible. For security purposes, use stronger algorithms like SHA-256, SHA-3, or purpose-built password hashing functions like bcrypt, scrypt, or Argon2. MD4 should only be used when required for legacy system compatibility.

Important: Never use MD4 for new projects or storing sensitive data. Use bcrypt, scrypt, or Argon2 instead. MD4 is suitable only for legacy system compatibility and checksums.

Frequently Asked Questions

No. MD4 has significant cryptographic vulnerabilities. It should only be used for legacy systems. Use SHA-256 or bcrypt for security-critical applications.
Theoretically no. MD4 is a one-way function—you cannot reverse it to get the original input. However, rainbow tables and brute force attacks can find matching inputs.
A collision occurs when two different inputs produce the same hash. MD4 is vulnerable to collision attacks, making it unsuitable for security-critical applications.
An MD4 hash is always 32 hexadecimal characters (128 bits) long. This is constant regardless of input size.
Yes! MD4 can hash files and text of any size. The output is always a 32-character hash regardless of input size.
For security: use SHA-256, SHA-3, or bcrypt. For file integrity: SHA-256. For passwords: bcrypt, scrypt, or Argon2. These are all more secure than MD4.
Yes! Our MD4 Generator is completely free with unlimited hashing and no registration required.
Use MD4 only for: legacy system compatibility, data deduplication in old systems, archive verification. Don't use for: passwords, security-critical data, new projects.

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