Code Quality Rank: L1
Programming language: C#
License: MIT License
Tags: Unix     IIS     Protocols     Ftp     Ftp-client     Ftps     Ssl     Tls    
Latest version: v20.0.0

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FluentFTP is a fully managed FTP and FTPS library for .NET & .NET Standard, optimized for speed. It provides extensive FTP commands, File uploads/downloads, SSL/TLS connections, Automatic directory listing parsing, File hashing/checksums, File permissions/CHMOD, FTP proxies, FXP transfers, UTF-8 support, Async/await support, Powershell support and more.

It is written entirely in C#, with no external dependencies. FluentFTP is released under the permissive MIT License, so it can be used in both proprietary and free/open source applications.



  • Full support for FTP, FXP, FTPS (FTP over SSL), FTPS with client certificates and FTPS with CCC (for FTP firewalls)
  • File management:
    • File and directory listing for all major server types (Unix, Windows/IIS, Azure, Pure-FTPd, ProFTPD, Vax, VMS, OpenVMS, Tandem, HP NonStop Guardian, IBM OS/400, AS400, Windows CE, Serv-U, etc)
    • Fully recursive directory listing and directory deletion (manual recursion and server-side recursion)
    • Easily upload and download a file from the server with progress tracking
    • Easily upload and download a directory from the server with easy synchronization modes
    • Easily transfer a file or folder directly from one server to another using the FXP protocol
    • Conditionally transfer files using rule based whitelisting and blacklisting
    • Automatically verify the hash of a file & retry transfer if hash mismatches
    • Configurable error handling (ignore/abort/throw) for multi-file transfers
    • Easily read and write file data from the server using standard streams
    • Create, append, read, write, rename, move and delete files and folders
    • Recursively deletes folders and all its contents
    • Get file/folder info (exists, size, security flags, modified date/time)
    • Get and set file permissions (owner, group, other)
    • Absolute or relative paths (relative to the "working directory")
    • Compare a local file against a remote file using the hash/checksum (MD5, CRC32, SHA-1, SHA-256, SHA-512)
    • Dereference of symbolic links to calculate the linked file/folder
    • Throttling of uploads and downloads with configurable speed limit
  • FTP protocol:
  • Asynchronous support:
    • Synchronous and asynchronous methods using async/await for all operations
    • Asynchronous methods for .NET 4.0 and below using IAsyncResult pattern (Begin*/End*)
    • All asynchronous methods can be cancelled midway by passing a CancellationToken
    • All asynchronous methods honor the ReadTimeout and automatically cancel themselves if timed out
    • Improves thread safety by cloning the FTP control connection for file transfers (optional)
    • Implements its own internal locking in an effort to keep transactions synchronized
  • Extensible:
    • Easily add support for custom non-standard FTP servers (see the Custom Servers page)
    • Easily add support for more file or directory filtering rules (simply extend FtpRule)
    • Easily add support for more proxy types (simply extend FtpClientProxy)
    • Easily add unsupported directory listing parsers (see the CustomParser example)
    • Easily add custom logging/tracing functionality using FtpTrace.AddListener
    • Easily add your own Powershell commands by extending the scripts in FluentFTP.ps1


Stable binaries are released on NuGet, and contain everything you need to use FTP/FTPS in your .Net/CLR application. For usage see the Quick Start Example and the Documentation wiki.

FluentFTP works on .NET and .NET Standard/.NET Core.

Platform Binaries Folder
.NET 2.0 net20
.NET 3.5 net35
.NET 4.0 net40
.NET 4.5 net45
.NET Standard 1.4 netstandard1.4
.NET Standard 1.6 netstandard1.6
.NET Standard 2.0 netstandard2.0
.NET Standard 2.1 netstandard2.1

FluentFTP is also supported on these platforms: (via .NET Standard)

  • Mono 4.6
  • Xamarin.iOS 10.0
  • Xamarin.Android 10.0
  • Universal Windows Platform 10.0

Binaries for all platforms are built from a single Visual Studio 2019 Project. You will need VS 2019 to build or contribute to FluentFTP.

Example Usage

To get started, check out the Quick start example in C#.

We also have extensive examples for all methods in C# and VB.NET.

Documentation and FAQs

Check the Wiki.


Special thanks to these awesome people who helped create FluentFTP!

<!--- https://contributors-img.firebaseapp.com/image?repo=robinrodricks/FluentFTP -->


FluentFTP is supported by these generous organizations:

JetBrains provides cutting-edge IDE and developer productivity tools. Balsamiq provides rapid and effective wireframing and UI design tools. YourKit provides a market-leading intelligent Java Profiler and .NET Profiler.

*Note that all licence references and agreements mentioned in the FluentFTP README section above are relevant to that project's source code only.