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MD4 Hash Generator

Generate MD4 hashes from text for old protocol fixtures, legacy software compatibility, and historical digest comparisons.

MD4128-bitUTF-8Browser based

Last updated: May 30, 2026

Client-Side Processing
Input Data Stays on Device
Instant Local Execution
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What is MD4 Hash Generator?

MD4 is a 128-bit message digest algorithm defined in RFC 1320. It influenced later algorithms such as MD5, but MD4 itself is cryptographically broken.

Use this page when you need to reproduce an MD4 digest for a legacy workflow, test fixture, or migration. For modern integrity checks, SHA-256 or SHA-512 is a better default.

How to Use MD4 Hash Generator

1

Type or paste the text you want to hash

2

Review the generated MD4 output

3

Toggle uppercase if a target system expects capital hex

4

Copy the digest for comparison, fixtures, or legacy compatibility checks

Common Use Cases

  • Reproducing old MD4 digest values for regression tests.
  • Debugging legacy protocols or migration scripts.
  • Comparing historical MD4 values during data cleanup.
  • Generating compatibility output for systems that still require MD4.

Example Input and Output

Generate an MD4 value from the standard sample input.

Input text
abc
MD4 hash
a448017aaf21d8525fc10ae87aa6729d

How This Tool Works

The tool encodes input as UTF-8 bytes and runs a browser-side RFC 1320 MD4 implementation. The digest is formatted as hexadecimal with an optional uppercase display toggle. No input is uploaded or stored.

Technical Stack

TypeScriptUTF-8 TextEncoderClient-side hashingNo network requests

Variant

RFC 1320 MD4 over UTF-8 input bytes.

Security note

MD4 is for legacy compatibility only. Prefer SHA-256 or SHA-512 for current integrity workflows.

Frequently Asked Questions

Is MD4 secure?

No. MD4 is cryptographically broken and should not be used for new security designs.

How long is an MD4 hash?

MD4 outputs 128 bits, displayed as 32 hexadecimal characters.

Why offer MD4 at all?

Some older systems and fixtures still require MD4-compatible output for migration or debugging.

Does hashing happen locally?

Yes. The MD4 calculation runs in your browser.

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