Cyberduck

Moving files to a web server or a storage bucket is a chore most people want to do by dragging and dropping, and Cyberduck is a browser for servers and cloud storage that does exactly that. It is libre software for macOS and Windows, with no registration or account needed, and its makers say that being open source means there are no backdoors.

Protocols and storage services

Cyberduck speaks SFTP, WebDAV and SMB, as well as FTP with or without SSL/TLS encryption, which covers Windows file shares and Samba servers. On the cloud side it reaches Amazon S3 in any region with support for large uploads, Google Cloud Storage, Microsoft Azure, OneDrive Personal and Business and SharePoint Online, Google Drive, Dropbox, Backblaze B2, OpenStack Swift providers and Box. It also connects to Nextcloud and ownCloud, including ownCloud Infinite Scale with OpenID Connect sign-in. Connection profiles are available for popular hosting providers.

Security

Authentication supports strong ciphers, public keys, two-factor sign-in and TLS mutual authentication with a client certificate, and settings can be read from an existing OpenSSH configuration. Cryptomator vaults give client-side encryption: file contents are encrypted individually, and file and directory names are obfuscated, whichever server or cloud is used.

Everyday use

Files on a server can be opened in any external editor and saved back. Users can copy web URLs, including CDN and pre-signed S3 links, to share. The browser caches for speed, handles Japanese and Chinese character sets and shows large folder structures in an outline view, with Quick Look previews on the Mac. Transfers can be limited in number, filtered by regular expression, resumed after interruption and run recursively.

Bookmarks and distribution

Bookmarks are organized by drag and drop, searchable and importable from other applications. Amazon CloudFront and Akamai distributions can be set up from a server origin. Its companion tools are a command-line version and Mountain Duck, which presents remote storage as a drive on the computer.