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A MD5 implementation for TypeScript

  • Can handle Unicode strings
  • Supports incremental hashing
  • Works with Files and Blobs

This library also includes tools for:

  • Hashing a file or blob
  • A webworker for performing hashing
  • A webworker handler for requesting files or blobs to be hashed
    • promise based
    • files or blobs are queued for processing on the webworker

Based on work by


Basic Hashing

  1. Import the class
    • import {Md5} from 'ts-md5/dist/md5';
  2. Hash some things
    • Md5.hashStr('blah blah blah') => hex:string
    • Md5.hashStr('blah blah blah', true) => raw:Int32Array(4)
    • Md5.hashAsciiStr('blah blah blah') => hex:string
    • Md5.hashAsciiStr('blah blah blah', true) => raw:Int32Array(4)

For more complex uses:

md5 = new Md5();
// Append incrementally your file or other input
// Methods are chainable
    .appendAsciiStr('a different string')
// Generate the MD5 hex string

Hashing a File

NOTE:: You have to make sure ts-md5/dist/md5_worker.js is made available in your build so it can be accessed directly by a browser It should always remain as a seperate file.

import {ParallelHasher} from 'ts-md5/dist/parallel_hasher';
let hasher = new ParallelHasher('/path/to/ts-md5/dist/md5_worker.js');
hasher.hash(fileBlob).then(function(result) {
   console.log('md5 of fileBlob is', result);

Building from src

The project is written in typescript and transpiled into ES5.

  1. Install TypeScript: npm install -g typescript (if you haven't already)
  2. Configure compile options in tsconfig.json
  3. Perform build using: tsc

You can find more information here:

Type Definitions

These allow projects like jasmine to work with .ts files. This is here as a guide more than anything else. See:

  1. Install typings: npm install typings --global (if you haven't already)
  2. Download definitions: typings install jasmine --ambient --save
  3. Reference the typings using /// <reference path="../typings/main.d.ts" /> from tests

To update typings:

  • From command line run: typings install


  1. Build Script: npm run build
  2. Test Script: npm run test


  1. Sign up to
  2. Configure package.json
  3. run npm publish