js-md5

What is js-md5?

The js-md5 npm package is a lightweight JavaScript library used to generate MD5 hashes. It is commonly used for hashing strings, files, and other data types to ensure data integrity, create unique identifiers, and for cryptographic purposes.

What are js-md5's main functionalities?

Hashing a String

This feature allows you to generate an MD5 hash from a given string. The code sample demonstrates how to hash the string 'Hello, World!' and output the resulting hash.

const md5 = require('js-md5');
const hash = md5('Hello, World!');
console.log(hash); // Outputs: '65a8e27d8879283831b664bd8b7f0ad4'

Hashing a File

This feature allows you to generate an MD5 hash from a file. The code sample demonstrates how to read a file into a buffer and then hash its contents.

const md5 = require('js-md5');
const fs = require('fs');
const fileBuffer = fs.readFileSync('path/to/file.txt');
const hash = md5(fileBuffer);
console.log(hash);

Hashing an ArrayBuffer

This feature allows you to generate an MD5 hash from an ArrayBuffer. The code sample demonstrates how to create an ArrayBuffer, populate it with data, and then hash its contents.

const md5 = require('js-md5');
const buffer = new ArrayBuffer(8);
const view = new Uint8Array(buffer);
view[0] = 0x01;
view[1] = 0x02;
const hash = md5(buffer);
console.log(hash);

Other packages similar to js-md5

crypto-js

Crypto-js is a widely-used library that provides a variety of cryptographic algorithms, including MD5, SHA-1, SHA-256, and more. It is more comprehensive than js-md5, offering a broader range of cryptographic functionalities.

md5

The md5 package is another popular library for generating MD5 hashes. It is similar to js-md5 in terms of functionality but is often preferred for its simplicity and ease of use.

hash.js

Hash.js is a library that provides a variety of hash functions, including MD5, SHA-1, and SHA-256. It is known for its performance and flexibility, making it a good alternative to js-md5 for more complex hashing needs.

README

js-md5

A simple and fast MD5 hash function for JavaScript supports UTF-8 encoding.

Demo

MD5 Online
MD5 File Checksum Online

Download

Compress
Uncompress

Benchmark

jsPerf Benchmark
File Benchmark

Installation

You can also install js-md5 by using Bower.

bower install md5

For node.js, you can use this command to install:

npm install js-md5

Notice

buffer method is deprecated. This maybe confuse with Buffer in node.js. Please use arrayBuffer instead.

Usage

You could use like this:

md5('Message to hash');
var hash = md5.create();
hash.update('Message to hash');
hash.hex();

// HMAC
md5.hmac('key', 'Message to hash');

var hash = md5.hmac.create('key');
hash.update('Message to hash');
hash.hex();

Node.js

If you use node.js, you should require the module first:

var md5 = require('js-md5');

TypeScript

If you use TypeScript, you can import like this:

import { md5 } from 'js-md5';

RequireJS

It supports AMD:

require(['your/path/md5.js'], function(md5) {
// ...
});

See document

Example

md5(''); // d41d8cd98f00b204e9800998ecf8427e
md5('The quick brown fox jumps over the lazy dog'); // 9e107d9d372bb6826bd81d3542a419d6
md5('The quick brown fox jumps over the lazy dog.'); // e4d909c290d0fb1ca068ffaddf22cbd0

// It also supports UTF-8 encoding
md5('中文'); // a7bac2239fcdcb3a067903d8077c4a07

// It also supports byte `Array`, `Uint8Array`, `ArrayBuffer`
md5([]); // d41d8cd98f00b204e9800998ecf8427e
md5(new Uint8Array([])); // d41d8cd98f00b204e9800998ecf8427e

// Different output
md5(''); // d41d8cd98f00b204e9800998ecf8427e
md5.hex(''); // d41d8cd98f00b204e9800998ecf8427e
md5.array(''); // [212, 29, 140, 217, 143, 0, 178, 4, 233, 128, 9, 152, 236, 248, 66, 126]
md5.digest(''); // [212, 29, 140, 217, 143, 0, 178, 4, 233, 128, 9, 152, 236, 248, 66, 126]
md5.arrayBuffer(''); // ArrayBuffer
md5.buffer(''); // ArrayBuffer, deprecated, This maybe confuse with Buffer in node.js. Please use arrayBuffer instead.
md5.base64(''); // 1B2M2Y8AsgTpgAmY7PhCfg==

// HMAC
md5.hmac.hex('key', 'Message to hash');
md5.hmac.array('key', 'Message to hash');
// ...

License

The project is released under the MIT license.

Contact

The project's website is located at https://github.com/emn178/js-md5
Author: Chen, Yi-Cyuan ([e-mail])

Changelog

v0.8.3 / 2023-10-09

Fixed

• package.json main property.