Cyberduck is an open-source file transfer client for accessing remote servers and cloud storage, uploading website files, managing hosted documents, and exchanging data across different storage providers.
Cyberduck is an open-source desktop application for browsing remote storage and transferring files between a computer, servers, and cloud services. It supports traditional connections such as FTP, SFTP, and WebDAV alongside storage platforms including Amazon S3, Azure, Backblaze B2, OneDrive, Google Drive, and Dropbox. Website maintainers can publish revised files, administrators can inspect remote directories, and users managing several storage accounts can access them through a consistent interface. Connections open as file listings where items can be uploaded, downloaded, renamed, or organized. The application focuses on direct control of stored files rather than providing its own hosting service or an online document editor.
Cyberduck needs valid credentials and suitable server permissions before it can access private storage; installing the client does not create a cloud account. Connection profiles provide service-specific configuration, while the selected protocol determines authentication and available operations. Users coordinating file deliveries through Mozilla Thunderbird (en-US) can email a provider-generated sharing link instead of attaching another copy. Remote editing works through an installed external application, with saved changes uploaded back to the server. Directory synchronization is started manually rather than continuously watching every folder. The Windows download requires a supported 64-bit system, and storage subscriptions or provider transfer charges remain separate from the client.
Cyberduck reduces the effort of maintaining files across unrelated hosting and cloud accounts by giving them a consistent desktop workflow. A website administrator can move from an SFTP server to an object-storage bucket without learning another upload interface, while named bookmarks help distinguish frequently used destinations. Transfer progress and bandwidth controls make large uploads easier to monitor without monopolizing a shared connection. Before updating a directory, reviewing the proposed changes helps catch an incorrect transfer direction or an unwanted replacement. For occasional content corrections, working in a familiar editor avoids repeating a separate download, edit, and upload sequence. Cyberduck also gives users a practical choice between sharing a hosted file and making an additional local copy. Optional encrypted vaults offer control over the readable content placed with a storage provider. These advantages are most relevant to deliberate file-management tasks; independent backups remain necessary for recovery from accidental changes.
Key capabilities and highlights.
Cyberduck bookmarks preserve connection details for frequently used servers and storage accounts. Nicknames and the bookmark search field help locate the correct destination without retyping its address. Bookmarks can be imported or exported, while individual connection settings let users accommodate different accounts and transfer requirements.
The Transfers window records pending and completed jobs and retains its list after restarting the application. Users can stop transfers, attempt to resume interrupted jobs, and limit bandwidth or parallel connections. Resume support depends on the server and protocol; unsupported operations may restart the file transfer instead.
Cyberduck compares a selected remote directory with a local folder using modification dates and checksums when available. A confirmation view lets users include or exclude individual items and choose upload, download, or bidirectional transfer. Timestamp preservation must be enabled, and synchronization must be started again when another comparison is needed.
Remote files open in a preferred local editor after being downloaded to a temporary directory. Saving changed content triggers an upload to the original server location. Cyberduck can optionally preserve earlier edited versions for supported protocols without native versioning, helping users revisit a previous revision when a correction goes wrong.
Cryptomator integration creates and opens encrypted vaults within supported remote storage. File contents and names are encrypted on the client, and directory structures are obscured before storage. Cyberduck supports vault formats 7 and 8; older format 6 vaults require migration with the Cryptomator application before they can be used.
Supported providers allow users to generate download links without distributing their storage account credentials. Options vary by service and can include expiring signed links, password protection, or upload requests. For Amazon S3, a temporary signed download link differs from the Share action that changes an object's access permissions.
Files and folders can be copied between two remote browser windows using drag and drop or copy and paste. Cyberduck uses server-side copying where the operation supports it; transfers between remote servers can instead download and upload through the computer. Local connectivity therefore still matters when planning a large migration.
FTP, SFTP, and WebDAV connections sit alongside cloud-specific integrations for services such as Amazon S3, Backblaze B2, Azure, OneDrive, and Dropbox. Cyberduck connection profiles adapt the login configuration to supported providers. Available permissions, sharing options, and storage operations depend on the chosen service rather than being identical across every connection.
Browse historical releases and previous builds.
Common questions about Cyberduck.
Yes. The direct-download application is open source and can be used without buying a license. Donations support development, and a contributor registration key disables the donation prompt. Store editions are sold separately; cloud providers may also charge for storage and transfers.
No. It manages remote files in its own browser windows. Mountain Duck is the developer's separate product for mounting remote storage in File Explorer or Finder.
No. The desktop client's synchronization is a manually started comparison and transfer operation. It is not a continuous folder watcher. Scheduled jobs can instead be built using the separate command-line client and an operating-system scheduler.
Provider-supported sharing links can grant access without revealing your account password. Treat the link as an access credential: anyone receiving a valid signed link may be able to download the file. Expiration, password protection, and revocation options depend on the provider and sharing method.
This entry lists version 9.5.4.45528, released on August 25, 2026. The official download page requires 64-bit Windows 10 or later. This release adds Windows sleep prevention during active transfers and support for hierarchical namespaces in Azure Data Lake filesystems.
Cyberduck is an open-source file transfer client for accessing remote servers and cloud storage, uploading website files, managing hosted documents, and exchanging data across different storage providers.
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