Swift SDK


Filestack Swift SDK allows programmatic file uploading, transformations, and other operations with Filestack URLs directly from your iOS application.

The Filestack Swift SDK supports iOS 11 and later.

List of features

  • Multi-part file uploading directly from your iOS application with Intelligent Ingestion support.
  • Extensive set of file transformations of images, videos and documents.
  • Cloud storage using the world’s largest cloud storage platforms.
  • Deliver content such as audio, video and documents via our Filestack CDN.
  • Perform operations with Filestack URLs such as downloading, overwriting, deleting or obtaining file metadata.
  • Monitor upload progress and cancel any ongoing upload operations.
  • Compatible with Swift 4.2 up to 5.0 and Objective-C.

Quick Example Upload

Uploading files directly to a storage location

This example uploads a file from the device located at localURL to Filestack’s default storage location.

let multiPartUpload = client.multiPartUpload(from: localURL) { response in
    // Try to obtain Filestack handle
    if let json = response?.json, let handle = json["handle"] as? String {
        // Use Filestack handle
    } else if let error = response?.error {
        // Handle error

Quick Example Transformation

Transforming an image

This example applies the following transformations to the Filestack URL pointed by handle:

  • Resizes image to be exactly 220 x 220 pixels by cropping it in the center.
  • Adds a watermark at 50% size and places it at the bottom right.
  • Adds a rounded corner with a radius of 20 pixels and applies a slight blur effect.

    let transformable = client.transformable(handle: "IMAGE-HANDLE")
    transformable.add(transform: ResizeTransform().width(220).height(220).fit(.crop).align(.center))
             .add(transform: WatermarkTransform(file: "WATERMARK-HANDLE").size(50).position([.bottom, .right]))
             .add(transform: RoundedCornersTransform().radius(20).blur(0.25))
    let storageOptions = StorageOptions(location: .s3, container: "S3-CONTAINER", access: .public)
    transformable.store(using: storageOptions, base64Decode: false) { (handle, response) in
    if let handle = handle {
        // TODO: Do something with handle
    } else if let error = response.error {
        // TODO: Handle error


Our Swift SDK can be installed using any of the methods listed below:


CocoaPods is a dependency manager for Cocoa projects. You can install it with the following command:

gem install cocoapods

To integrate FilestackSDK into your Xcode project using CocoaPods, specify it in your Podfile:

source 'https://github.com/CocoaPods/Specs.git'
platform :ios, '11.0'

target '<Your Target Name>' do
    pod 'FilestackSDK', '~> 2.0'

Then, run the following command:

pod install


Carthage is a decentralized dependency manager that builds your dependencies and provides you with binary frameworks.

You can install Carthage with Homebrew using the following command:

brew update
brew install carthage

To integrate FilestackSDK into your Xcode project using Carthage, specify it in your Cartfile:

github "filestack/filestack-swift" ~> 2.0

Run carthage update to build the framework and drag the built FilestackSDK.framework into your Xcode project. Additionally, add FilestackSDK.framework, Alamofire.framework and CryptoSwift.framework to the embedded frameworks build phase of your app’s target.


Embedded Framework

Open up Terminal, cd into your top-level project directory, and run the following command “if” your project is not initialized as a git repository:

git init

Add FilestackSDK and its dependencies as git submodules by running the following commands:

git submodule add https://github.com/filestack/filestack-swift.git
git submodule add https://github.com/Alamofire/Alamofire.git
git submodule add https://github.com/krzyzanowskim/CryptoSwift.git

Open the new filestack-swift folder, and drag the FilestackSDK.xcodeproj into the Project Navigator of your application’s Xcode project.

It should appear nested underneath your application’s blue project icon. Whether it is above or below all the other Xcode groups does not matter. Select the FilestackSDK.xcodeproj in the Project Navigator and verify the deployment target matches that of your application target.

Next, select your application project in the Project Navigator (blue project icon) to navigate to the target configuration window and select the application target under the “Targets” heading in the sidebar.

In the tab bar at the top of that window, open the “General” panel.

Click on the + button under the “Embedded Binaries” section and choose the FilestackSDK.framework for iOS.

Repeat the same process for adding Alamofire and CryptoSwift dependencies.


Integration into a Swift project

First import the framework into your code:

import FilestackSDK

And then instantiate a Client object:

  • Without security options:

    // Initialize your `Client` object by passing a valid API key.
    let client = Client(apiKey: "YOUR-API-KEY")
  • With security options:

    // Initialize a `Policy` with the expiry time and permissions you need.
    let oneDayInSeconds: TimeInterval = 60 * 60 * 24 // 24-hour time interval
    let policy = Policy(
    expiry: Date(timeIntervalSinceNow: oneDayInSeconds), // Set your expiry time
    call: [.convert, .read, .runWorkflow, .store]        // Set your policy permissions
    // Initialize a `Security` object by providing a `Policy` object and your app secret.
    // You can find and setup your app secret in the Developer Portal.
    guard let security = try? Security(policy: policy, appSecret: "YOUR-APP-SECRET") else { return }
    // Initialize your `Client` object by passing a valid API key, and security options.
    let client = Client(apiKey: "YOUR-API-KEY", security: security)

For more information, please consult our API Reference.