Filestack Upload Logo

Fast, Reliable & Secure File Uploader & API

File picker

Better file uploads. Better engagement for your apps.

Dramatically improve the look and performance your file uploader with two lines of code

Filestack Upload gives you the same upload technology used by internet giants without the struggle of having to maintain it.

Transformations in the file picker

An Instant Ux Upgrade

Filestack’s beautiful and customizable file uploader UI makes a file upload from any source painless and intuitive.

Content Ingestion Network Illustration

A Huge Boost in Performance

Behind the scenes, Filestack’s advanced infrastructure uploads files almost 4 times faster.

Powerful Ways To Access Files

No matter the method, Filestack handles the hard work and integrations required to make file access easy and reliable.

Drag & Drop or Copy & Paste

Allow your users to perform a file upload using the natural interactions they already know from using desktop applications.

Try it out! Drag and drop or copy and paste any file

Click to pick files & images

Make any button or link open a file dialog just as users expect. Once the file is selected, Filestack auto-generates a preview and assists the upload process – making it faster and more reliable.

Try it out! Click the button to upload files →

Connect to dozens of online accounts

Connect to content directly from the sources where your users have it – without the hassle or effort often required. Filestack maintains dozens of integrations with popular services, requiring no integration work on your part.

← Try it out! Connect to an online account

Add realtime photos, video, and audio

Allow users to use device cameras to instantly add photos, audio recordings, and video. Often a complex process to support on multiple devices, Filestack makes it easy to add realtime capture right inside your app.

Try it out! Click an icon to experience realtime capture →

Add audio
Add audio
Add photo
Add photo
Add video
Add video

Connect to your own Custom Sources

Add your own integration to the Filestack File Picker based either on static list of files or dynamic integration of your choice.

Custom Source

Connect your app to files from over 20 sources. See them all

Desktop Icon Facebook Icon Dropbox Icon Box Icon Github Icon

Way more than a file uploader widget: a complete upload service.

What you can get only from Filestack

Better reliability

Filestack Intelligent Ingestion™ can dynamically adjust to changing network conditions to guarantee upload success 99.999% of the time.

Accelerated uploads

Filestack’s exclusive technology can provide your app immediate access to content - even while it’s still in transit accros the network.

One API forever

Filestack brings images, videos, and files to your app from 20+ sources through a single, stable API. (No need to maintain an integration to each service).

Preview Icon


Users can preview their uploaded files directly inside the File Picker.

Preview Icon

Connect to 20+ Cloud Drives

Connect your app directly to AWS, Facebook, Dropbox, Instagram, and more.

Progressbar Icon

Progress Bar Uploads

Give your users confidence that their files are on the way to the right destination.

Multi-File Upload Icon

Multi-File Uploads

Let your users upload multiple files at one time for speed and simplicity.

Custom CSS Icon

Custom CSS

Filestack blends seamlessly into your website or app. Ask about white-labeling.

Client-Side Crop Icon

Client-Side Crop

Users can crop files to perfection before sending them to your website or app.

Unlimited Uploading Icon

Unlimited Uploading

Upload any file type, from any local or cloud source, at any scale.

Websites & HTML Icon

Websites & HTML

Filestack can even load web content from any public URL and capture the rendered page as an image. Perfect for generating screenshots, previews, or converting HTML-based content into other formats.

Secure Cloud Storage Icon

Secure Cloud Storage

Store uploads directly in your cloud storage for ease and accessibility.

Just One Integration, One Time...

Filestack connects you with a multitude of services with one simple integration. You never have to worry about updating API integrations again. Uploading Files is our raison d’etre. We update for other API changes, and will never depreciate our API or force unwarranted changes on you.

Libraries & SDKs
Choose from our SDKs to get started: Javascript, Ruby, PHP, Python, Swift, Android
No maintenance required
Once you integrate, you’re done. Never worry about changing APIs disrupting your file workflow again.
Dev-to-dev support
Your files are always our #1 concern. We are always here to help you get up and running and assure the best performance.
Examples of code snippets
import * as filestack from 'filestack-js';
const client = filestack.init('YOUR API KEY');
client.upload(fileObject).then(data =>console.log(data.url));
gem 'filestack'
client ='YOUR_API_KEY',
security: security_object)
filelink = client.upload(filepath: '/path/to/file')
$ composer require --prefer-dist

use Filestack\FilestackClient;

$client = new FilestackClient('YOUR_API_KEY');
$filelink = $client-upload('/path/to/file');
$ pip install filestack-python

from filestack import Client
client = Client("")

params = {'mimetype': 'image/png'}
new_filelink =

Frequently Asked Questions

What is the maximum file size that can be uploaded?

The maximum file size that can be uploaded is up to 5 GB, depending on the plan you choose.

What programming languages does Filestack support?

How does Filestack handle image transformations?

What is Intelligent Ingestion™?

What integrations does Filestack offer for cloud storage providers?

How does Filestack handle security?