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NTLM Hash Generator

Generate NTLM hashes for Windows authentication testing. Create MD4-based NT hashes from passwords.

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Windows NTLM Hash Generator

Generate NTLM hashes used in Windows authentication systems. NTLM is created by hashing the UTF-16LE encoded password with MD4, producing a 32-character hexadecimal fingerprint.

Windows Authentication

Security Information

NTLM is considered cryptographically weak and should not be used for new systems. This tool is for educational purposes, security research, and legacy system testing only. Never use real production passwords in online tools.

Why Use This Tool?

Windows Testing

Validate Windows authentication implementations and test NTLM-based systems.

Password Auditing

Generate reference hashes for security audits and penetration testing.

Batch Processing

Hash multiple passwords at once with batch mode for efficient testing.

100% Client-Side

Passwords never leave your browser. Zero server transmission.

How this NTLM Hash Generator works

This Windows authentication tool generates NTLM hashes by applying MD4 to UTF-16LE encoded passwords, producing the 32-character hexadecimal hashes stored in Windows SAM databases. NTLM (NT LAN Manager) remains prevalent in legacy Windows environments despite its cryptographic weaknesses including lack of salt and reliance on the deprecated MD4 algorithm.

Single mode processes individual passwords with real-time hashing and show/hide password toggle for secure entry. Batch mode accepts multiple passwords (line-separated), generating corresponding hashes simultaneously for security auditing or penetration testing workflows. Sample loaders demonstrate expected input/output formats.

Security warnings emphasize NTLM's limitations—no salting means identical passwords produce identical hashes, and MD4 vulnerabilities make these hashes susceptible to rainbow table attacks. All hashing occurs client-side without server transmission. Common applications include security research, Windows authentication testing, password audit preparation, and educational demonstrations of legacy hash weaknesses.

How to Use

1

Enter Password

Type a password or switch to batch mode for multiple passwords.

2

Get NTLM Hash

The MD4-based Windows NTLM hash is generated instantly.

3

Copy Hash

Copy the 32-character hexadecimal hash for testing or analysis.

Example Usage

NTLM hash of "password":

Input
password
Output
A4F49C406510BDCAB6824EE7C30FD852

Frequently Asked Questions

What is NTLM?
NTLM (NT LAN Manager) is a Windows authentication protocol. The NTLM hash is created by applying MD4 to a UTF-16LE encoded password, producing a 32-character hex string.
Why generate NTLM hashes?
Security professionals use NTLM hashes for penetration testing, password auditing, and understanding Windows authentication. Developers may need them for testing authentication systems.
Is NTLM secure?
NTLM is considered weak by modern standards. It has no salting, uses the outdated MD4 algorithm, and is vulnerable to pass-the-hash attacks. Microsoft recommends using Kerberos instead.
Is this tool safe?
Yes! All hashing happens in your browser. Passwords are never sent to any server. For real password testing, always run such tools in isolated environments.
What's the format of NTLM hashes?
NTLM hashes are 32 hexadecimal characters (128 bits). Example: "password" = a4f49c406510bdcab6824ee7c30fd852

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The NTLM Hash Generator is maintained by CodeItBro. We aim to provide the best free developer tools on the web. If you have feedback or suggestions, please visit our contact page.