YoSin Tools

MD4 File Hash Calculator

Compute the MD4 checksum of any file directly in your browser. Drag and drop a file or provide a URL — no upload, no server, complete privacy.

File Input
File
Drag and drop a file here, or click to select. Processed locally — never uploaded.
Output
Settings
Calculate

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Frequently Asked Questions

How do I get the MD4 hash of a file?
Drop your file onto the input zone or click to browse. The MD4 hash is calculated immediately in your browser and shown in the Output area. Click the copy button to copy the result.
Is my file sent to any server?
No. The file is read entirely in your browser using the HTML5 File API. No data leaves your device.
Why would I use MD4 instead of MD5?
MD4 is primarily useful when working with legacy systems or protocols — most notably Microsoft NTLM password hashes — that specifically require MD4. For general file integrity or security purposes, MD5 or SHA-256 is a better choice.
What output formats are available?
You can output the hash as lowercase hex, uppercase hex, or Base64, making it easy to match against checksums from different sources or systems.

About MD4 File Hash Calculator

This tool computes the MD4 hash of any file you select, entirely within your browser. The MD4 algorithm was designed by Ronald Rivest in 1990 and produces a 128-bit (32 hex character) digest. It processes data in 512-bit blocks using three rounds of bitwise operations.

Use Cases

The primary modern use of MD4 file hashing is in compatibility testing with legacy Windows authentication systems that rely on NT hashes (MD4 of UTF-16LE encoded passwords). Security researchers and system administrators working with NTLM or NTLMv2 authentication may need MD4 for analysis. The tool is also useful for verifying checksums from older software releases that list MD4 values.

Privacy

Your files are never sent anywhere. The entire computation takes place in your browser's JavaScript engine. This makes the tool safe to use with sensitive or confidential files — no data is logged, stored, or transmitted.

Limitations

MD4 is cryptographically broken and should not be relied upon for security purposes. If you need to verify file integrity for security reasons — for example, to confirm a downloaded binary has not been tampered with — use SHA-256 or SHA-512 instead, as they offer collision resistance that MD4 does not.