MD5 Hash Generator Online Tool

This online MD5 Hash Generator tool helps you to encrypt one input string into a fixed 128 bits MD5 String.

Paste your Input String or drag text file in the first textbox, then press "MD5 Encrypt" button, and the result will be displayed in the second textbox.

Hash algorithm such as MD5 is a one-direction algorithm, which means it's not reversable. This character makes MD5 very useful in making "fingerprint" on a file, MD5 value of a file can prove a file haven't been modified. Hash algorithm also used in password protection. Combine a "salt" and your original password, the final value stored in website database is not reversable, means hackers can't recover your password even if the database is leaked.

The first attack is called "rainbow tables". It's a very large database include short simple string with corresponding MD5 value. For example, when you check the rainbow table for "FC5E038D38A57032085441E7FE7010B0", you can find its original string is "helloworld". Rainbow tables can successfully decrypt MD5 if the original string is short.

The second attack is based on MD5's fundamental algorithm, more and more website switched to SHA256 or SHA512 in recent years. Even though many websites are still using MD5, which leaves big potential catastrophe in Internet security.

Absolutely NOT, this MD5 Hash Generator doing all the formatting work on the client side, all logic are implemented by Javascript. There are 2 major advantages: 1.Your data never transmitted in the Open Internet, so you know it's secure; 2.It's much faster than doing all the work in the server side, because there is no Internet Delay.

RFC 1321: https://www.ietf.org/rfc/rfc1321.txt

Python Implementation of MD5 (hashlib): https://docs.python.org/3/library/hashlib.html

Java Implementation of MD5: https://docs.oracle.com/javase/7/docs/api/java/security/MessageDigest.html

PHP Implementation of MD5: http://php.net/manual/en/function.md5.php

import hashlib

def md5_generator(str):
    m = hashlib.md5()
    m.update(str.encode())
    return m.hexdigest()
    

import java.math.BigInteger;
import java.security.MessageDigest;

public String generate(String str){
    MessageDigest md = MessageDigest.getInstance("MD5");
    md.update(str.getBytes());
    byte[] digest = md.digest();
    String result = new BigInteger(1, digest).toString(16).toUpperCase();
    return result;
}
    

root@instance-1:/var/log/apache2# openssl dgst -md5 access.log
MD5(access.log)= 742f23518e684f3562ffc9f983f190ba