FileKit Logo - File picker and utilities for Kotlin Multiplatform KMP, Compose Multiplatform CMP

FileKit is a lightweight yet powerful library that simplifies file operations across multiple platforms using Kotlin Multiplatform.

Whether you need to pick files, save documents, access photos, or manage directories, FileKit provides a consistent API that works seamlessly on Android, iOS, macOS, JVM (Windows, macOS, Linux), JS, and WASM.

// Pick an image file
val imageFile = FileKit.openFilePicker(type = FileKitType.Image)

// Pick multiple files
val files = FileKit.openFilePicker(mode = FileKitMode.Multiple())

// Pick a directory
val directory = FileKit.openDirectoryPicker()

// Save a file
PlatformFile(directory, "image.png").write(imageFile)

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Why Choose FileKit?

Cross-Platform

One API for all platforms: Android, iOS, macOS, JVM, JS, and WASM

Native experience

Uses platform-native file pickers for the best user experience

Lightweight

Minimal dependencies to keep your app fast and lean

Integrations

Seamless integration with Compose Multiplatform, Coroutines, kotlinx-io, Coil…

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Key Features

FileKit offers a comprehensive suite of tools for handling files across platforms:

FileKit illustration

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File Operations

  • File & Media Pickers: Open files, images, videos, or any document type with platform-native pickers
  • Directory Selection: Access directories easily with native folder pickers
  • File Saving: Save files to user-selected locations
  • Cross-Platform API: Write once, run everywhere with consistent behavior

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Integration & Utilities

  • Compose Multiplatform Support: Seamless integration with Compose UI
  • Coroutines Support: Asynchronous file operations with Kotlin coroutines
  • Platform File Abstraction: Work with files consistently across platforms
  • Coil Integration: Display images from files easily in your Compose UI

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Getting Started

Get up and running with FileKit in minutes with our comprehensive guides:

Quick Start

Get started with FileKit in minutes

Installation

Add FileKit to your Kotlin Multiplatform

Core Concepts

Learn about PlatformFile and essential FileKit concepts

Dialogs setup

Pick files, save files, and more with FileKit Dialogs

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Modular Structure

FileKit is designed to be modular, allowing you to include only what you need:

  • FileKit Core: Basic file operations and the PlatformFile abstraction
  • FileKit Dialogs: File pickers and save dialogs without UI dependencies
  • FileKit Dialogs Compose: Compose Multiplatform integration for file operations
  • FileKit Coil: Integration with Coil for image loading

Check out our sample projects to see FileKit in action across different platforms.