# Cyberduck — Cross-Platform Cloud Storage and File Transfer Client

> Cyberduck is a free, open-source file transfer client for macOS and Windows supporting FTP, SFTP, WebDAV, Amazon S3, Google Cloud, Azure, Backblaze B2, Dropbox, and many more cloud storage providers.

## Install

Save in your project root:

# Cyberduck — Cloud Storage & File Transfer Client

## Quick Use
```bash
# macOS
brew install --cask cyberduck
# Windows: download from cyberduck.io or use Chocolatey
choco install cyberduck
```

## Introduction
Cyberduck is a versatile file transfer client that connects to virtually any remote storage service. Whether you need to manage files on an SFTP server, sync content to Amazon S3, or browse a WebDAV share, Cyberduck provides a unified interface with strong encryption support via its companion tool Cryptomator.

## What Cyberduck Does
- Connects to FTP, SFTP, WebDAV, S3, Google Cloud, Azure, B2, and 20+ providers
- Browses, uploads, downloads, and synchronizes files and folders
- Encrypts files client-side with Cryptomator vault integration
- Generates pre-signed and temporary URLs for shared access
- Provides a CLI companion (duck) for scripting and automation

## Architecture Overview
Cyberduck is written in Java with native platform bindings for macOS (Cocoa) and Windows (Win32). It uses a modular connection framework where each cloud provider is implemented as a separate protocol plugin. The transfer engine supports multi-segment parallel transfers, retry logic, and bandwidth throttling. Cryptomator integration encrypts files transparently before upload.

## Self-Hosting & Configuration
- Install from cyberduck.io, Homebrew Cask, or Chocolatey
- Bookmark connections for quick access with stored credentials
- Use connection profiles to configure custom S3-compatible endpoints
- Integrate with system keychain for secure credential storage
- CLI tool 'duck' enables scripted uploads and downloads in CI/CD

## Key Features
- Supports 20+ cloud and file transfer protocols in one client
- Transparent client-side encryption with Cryptomator vaults
- Parallel multi-segment transfers with bandwidth throttling
- CLI companion (duck) for automation and shell scripting
- Free and open source under GPL license

## Comparison with Similar Tools
- **FileZilla** — FTP-focused with fewer cloud integrations; Cyberduck covers S3, Azure, and more
- **WinSCP** — Windows-only; Cyberduck runs on both macOS and Windows
- **Transmit** — macOS-only and paid; Cyberduck is free and cross-platform
- **rclone** — CLI-only for cloud sync; Cyberduck adds a graphical interface
- **Mountain Duck** — same team, mounts cloud storage as a drive; Cyberduck is the transfer client

## FAQ
**Q: Is Cyberduck free?**
A: Yes. Cyberduck is GPL-licensed and free to download. The App Store version includes a small contribution fee.

**Q: Does it support S3-compatible storage like MinIO?**
A: Yes. Create a custom connection profile pointing to your S3-compatible endpoint.

**Q: Can I encrypt files before uploading?**
A: Yes. Cyberduck integrates with Cryptomator to create encrypted vaults on any cloud provider.

**Q: Is there a command-line version?**
A: Yes. The 'duck' CLI supports the same protocols and can be used in scripts and CI pipelines.

## Sources
- https://github.com/iterate-ch/cyberduck
- https://cyberduck.io

---
Source: https://tokrepo.com/en/workflows/asset-b8845f11
Author: AI Open Source