JavaScript Quickstart Guide

MinIO JavaScript Library for Amazon S3 Compatible Cloud Storage Slack


The MinIO JavaScript Client SDK provides simple APIs to access any Amazon S3 compatible object storage server.

This quickstart guide will show you how to install the client SDK and execute an example JavaScript program. For a complete list of APIs and examples, please take a look at the JavaScript Client API Reference documentation.

This document assumes that you have a working nodejs setup in place.

Download from NPM

npm install --save minio

Download from Source

git clone
cd minio-js
npm install
npm install -g

Using with TypeScript

minio>7.1.0 is shipped with builtin type definition, @types/minio is no longer needed.

Initialize MinIO Client

You need five items in order to connect to MinIO object storage server.




URL to object storage service.


TCP/IP port number. This input is optional. Default value set to 80 for HTTP and 443 for HTTPs.


Access key is like user ID that uniquely identifies your account.


Secret key is the password to your account.


Set this value to ‘true’ to enable secure (HTTPS) access

var Minio = require('minio')

var minioClient = new Minio.Client({
  endPoint: '',
  port: 9000,
  useSSL: true,
  accessKey: 'Q3AM3UQ867SPQQA43P2F',
  secretKey: 'zuf+tfteSlswRu7BJ86wekitnifILbZam1KYY3TG',

Quick Start Example - File Uploader

This example program connects to an object storage server, makes a bucket on the server and then uploads a file to the bucket.

We will use the MinIO server running at in this example. Feel free to use this service for testing and development. Access credentials shown in this example are open to the public.


var Minio = require('minio')

// Instantiate the minio client with the endpoint
// and access keys as shown below.
var minioClient = new Minio.Client({
  endPoint: '',
  port: 9000,
  useSSL: true,
  accessKey: 'Q3AM3UQ867SPQQA43P2F',
  secretKey: 'zuf+tfteSlswRu7BJ86wekitnifILbZam1KYY3TG',

// File that needs to be uploaded.
var file = '/tmp/photos-europe.tar'

// Make a bucket called europetrip.
minioClient.makeBucket('europetrip', 'us-east-1', function (err) {
  if (err) return console.log(err)

  console.log('Bucket created successfully in "us-east-1".')

  var metaData = {
    'Content-Type': 'application/octet-stream',
    'X-Amz-Meta-Testing': 1234,
    example: 5678,
  // Using fPutObject API upload your file to the bucket europetrip.
  minioClient.fPutObject('europetrip', 'photos-europe.tar', file, metaData, function (err, etag) {
    if (err) return console.log(err)
    console.log('File uploaded successfully.')

Run file-uploader

node file-uploader.js
Bucket created successfully in "us-east-1".

mc ls play/europetrip/
[2016-05-25 23:49:50 PDT]  17MiB photos-europe.tar

API Reference

The full API Reference is available here.

API Reference : Bucket Operations

API Reference : File Object Operations

API Reference : Object Operations

API Reference : Presigned Operations

API Reference : Bucket Notification Operations

API Reference : Bucket Policy Operations

Full Examples

Full Examples : Bucket Operations

Full Examples : File Object Operations

Full Examples : Object Operations

Full Examples : Presigned Operations

Full Examples: Bucket Notification Operations

Full Examples: Bucket Policy Operations

Custom Settings

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