md5-hex 
Create a MD5 hash with hex encoding
Please don't use MD5 hashes for anything sensitive!
Works in the browser too, when used with browserify/webpack.
Checkout hasha if you need something more flexible.
Install
$ npm install --save md5-hex
Usage
const fs = require('fs');
const md5Hex = require('md5-hex');
const buffer = fs.readFileSync('unicorn.png');
md5Hex(buffer);
//=> '1abcb33beeb811dca15f0ac3e47b88d9'API
md5Hex(input)
input
Type: Buffer string Buffer[] string[]
Prefer buffers as they're faster to hash, but strings can be useful for small things.
Pass an array instead of concatenating strings and/or buffers. The output is the same, but arrays do not incur the overhead of concatenation.
License
MIT © Sindre Sorhus