MD4 Hash Generator – Free Online MD4 Calculator

MD4 Hash Generator – Create MD4 Hashes Online

Our free MD4 Generator converts any text into its MD4 hash instantly. Type or paste your text and get a 128-bit hash shown as 32 hexadecimal characters — ideal for checksums, data verification and development work. No installation or sign-up is needed.

What is MD4?

MD4 is a cryptographic hash function: it takes input of any length and produces a fixed-length 128-bit output, written as 32 hexadecimal characters. The same input always gives the same hash, but changing even a single character produces a completely different result.

MD4 was published by Ronald Rivest in 1990 and inspired later designs such as MD5 and SHA-1. It is still used inside some legacy protocols, most notably for NTLM password hashes in older Windows networks.

MD4 is completely broken; collisions can be produced in seconds. Never use it for new security work.

How to use the MD4 Generator

1. Type or paste your text into the input box.
2. Click the generate button to calculate the MD4 hash.
3. Copy the result with one click.
4. Compare it with another hash to confirm the data has not changed.

Key features

• Instant MD4 hashing of any text
• Standard 32-character hexadecimal output
• One-click copy of the result
• Free with no limits for normal use

Common use cases

• Verifying file or message integrity with checksums
• Generating unique keys and identifiers in software
• Testing and debugging applications that use MD4
• Working with legacy systems that still rely on MD4
• Learning how hash functions behave for study or teaching

Frequently asked questions

Can a MD4 hash be decrypted?

No. Hashing is one-way; there is no key to reverse it. Weak or common inputs can sometimes be guessed with lookup tables, which is why passwords need salting and slow algorithms.

Is MD4 safe for storing passwords?

No fast hash, including MD4, should be used alone for passwords. Use our Bcrypt Generator or another slow, salted algorithm instead.

Why is my MD4 hash different from another tool?

Hidden spaces, line breaks or a different character encoding change the input and therefore the hash. Make sure the text is exactly the same.

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