MD4 Hash Generator

What is MD4?

MD4 is the predecessor to MD5, taking any input — text or a file — and producing a fixed-length, 128-bit (32 hexadecimal character) digest. It's faster than MD5 but has known cryptographic weaknesses that make it even less secure. The same input always produces the same hash, and even a tiny change to the input produces a completely different result.

This tool hashes typed text or an uploaded file directly using MD4, entirely inside your browser.

How to use it

How the hash is calculated

The input is read as raw bytes — either the UTF-8 bytes of typed text, or the exact bytes of an uploaded file — and processed through the selected algorithm entirely in JavaScript, producing a 128-bit digest displayed as 32 hexadecimal characters.

Features & benefits

Why this runs entirely in your browser

Files and text hashed here can contain private data, so nothing is uploaded to a server. The algorithm runs entirely in JavaScript locally in the tab, which means it keeps working offline once the page has loaded.

Common uses

Verifying a downloaded file matches its published checksum, quickly comparing two files for equality without opening them, generating a stable cache key from a string, or working through a computer science exercise on legacy hashing algorithms.