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FileZilla Icon
FileZilla 3.7.3 running under Ubuntu MATE
Developer(s) Tim Kosse
Initial release 22 June 2001 (2001-06-22)
Stable release 3.14.1 (October 16, 2015 (2015-10-16)) [1]
Preview release 3.14.0-rc2 (September 9, 2015 (2015-09-09)) [2]
Written in C++, wxWidgets
Operating system Cross-platform
Size 5.8 MB
Available in Multilingual
Type FTP client
License GNU General Public License Version 2
Website .orgfilezilla-project

FileZilla is a free software, cross-platform FTP application, consisting of FileZilla Client and FileZilla Server. Client binaries are available for Windows, Linux, and Mac OS X, server binaries are available for Windows only. The client supports FTP, SFTP and FTPS (FTP over SSL/TLS). Support for SFTP (SSH File Transfer Protocol), which can be used to share folders over a network, is not implemented in FileZilla Server.[3]

FileZilla's source code is hosted on

  • Official website
  • FileZilla on
  • FileZilla Server FAQ
  • FileZilla Wiki

External links

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  5. ^ FileZilla history
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  36. ^ a b c FileZilla Project, FileZilla FTP Server, accessed: 8 April 2012
  37. ^ Ticket #4672 (assigned Bug report) - Download continues past 100% corrupting downloaded zip file


See also

Unlike some other FTP clients, FileZilla does not implement a workaround for an error in the IIS server which causes file corruption when resuming large file downloads.[37]


  • Compression with MODE Z[36]
  • Encryption with SSL/TLS (for FTPS)[36]

FileZilla Server supports FTP and FTPS (FTP over SSL/TLS).[36] It includes numerous functionalities, including:


FileZilla Server is a

FileZilla Server is a sister product to FileZilla Client. It is an FTP server supported by the same project and features support for FTP and FTP over SSL/TLS.[35] FileZilla Server is currently available only on the Windows platform.

MODE Z compression as implemented in FileZilla FTP Server
FileZilla Server
FileZilla Icon
FileZilla Server main interface
Developer(s) Tim Kosse, et al.
Stable release 0.9.53 (June 12, 2015 (2015-06-12)) [34]
Preview release none (n/a)
Written in C++
Operating system Windows
Type FTP server
License GPL

FileZilla Server

Release history
Version Release Date[33] Changes
3.7.1-rc1 10 June 2013 New Features:
  • Add command-line option to specify initial local directory

Bugfixes and minor changes:

  • Fix crash on OS X if connecting using FTP over TLS
  • Prevent file lists from jumping when they are not supposed to
3.7.1 18 June 2013 Bugfixes and minor changes:
  • Updated translations 2 July 2013 Bugfixes and minor changes:
  • Minor bump for installer changes
3.7.2 6 August 2013 Fixed vulnerabilities:
  • Apply a fix for a security vulnerability in PuTTY as used in FileZilla to handle SFTP.
3.7.3 7 August 2013 Fixed vulnerabilities:
  • Apply a fix for a security vulnerability in PuTTY as used in FileZilla to handle SFTP. See CVE-2013-4206, CVE-2013-4207, and CVE-2013-4208 for reference
3.8.1-rc2 25 May 2014 Bugfixes and minor changes:
  • Rebuilt to address a problem with the filenames of the rc1 binaries.
3.8.1-rc3 25 May 2014 Bugfixes and minor changes:
  • Fixed bundling of .xrc resources in non-Windows binaries
3.8.1 1 June 2014 Fixed vulnerabilities:
  • Updated official binaries to use GnuTLS 3.2.15, addressing CVE-2014-3466

New Features:

  • OS X: Partial support for retina displays

Bugfixes and minor changes:

  • Fixed several small memory leaks
3.9.0 27 July 2014 New Features:
  • Added Lao translation
  • Added an additional icon set
  • OS X: Holding modifier key while clicking Site Manager toolbar icon now shows the site dropdown menu

Bugfixes and minor changes:

  • MSW: Fix assertion when entering UNC paths
  • Fix button layout of editing dialogs
  • nix, OS X: Small performance improvement recursing through local directories 1 February 2015 Bugfixes and minor changes:
  • Fix editing of files with the same name in different directories
The release notes shown are for the current series build.
Color Meaning
Pink Former test release
Red Former official release
Green Current official release
Blue Current test release

Release history

Storing encrypted private key files is still not supported in current versions, as well as using ssh-agent, in the same way as previous versions of FileZilla. Private key authentication is usually recommended over password-based authentication.[32]

However, the proposed Master Password encryption would be the only solution in certain use cases. On Windows 7 and 8, users would need a Professional or higher license for NTFS Encrypting File System, or Enterprise for Bitlocker drive encryption in order to make your system secure enough for plaintext passwords, effectively making the other Windows editions insecure for using with FileZilla.[30] Furthermore, FileZilla does not communicate to the user the fact that passwords are stored in plain text.[31]

From version 3 onwards, FileZilla stores all saved usernames and passwords as plain text files. This allows any malware that has gained even limited access to the user's system to simply read the data stored in these files and to remotely transfer this data to the attacker, potentially handing over control of websites and servers used for further spreading malware[27] and creating powerful botnets.[28] FileZilla's author responded to such criticism saying "If your system is secure, you can use nuclear missile launch codes as desktop background."[29]

Missing password encryption

The FileZilla web page currently still offers additional download options without adware installs, but the link to the adware download appears as the primary link, highlighted and marked as "recommended". The program author keeps saying in the project's forum that all additional downloads were optional, could "easily be declined" and that "nothing will be installed without consent". On the question, if he was urged by the project's host to accept the bundling of downloads with adware, he negated and explained: "I do this for a living".[26]

Since middle of 2013, the project's hosting site,, provides the main download of FileZilla with a download wrapper, "offering" additional software for the user to install. Numerous reports[20][21] of users say that some of the adware installs without consent, despite declining on all install requests[22] or uses deception to obtain the user's "acceptance" to install. Among the reported effects are: web browser being hijacked, with content, start page and search engines being forcibly changed, disturbing popup windows, privacy/spying issues, sudden shutdown and restart events possibly leading to loss of current work. Some of the adware is reported to resist removal or restoring of previous settings, or are said to re-install after a supposed removal.[23][24] Also, users reported adware programs to download and install more unwanted software, some causing alerts by security suites, for being genuine malware.[25]

Bundled adware issues


Since the project's participation in SourceForge's program to create revenue by adware, which is frequently perceived as deceptive and malware,[17] several reviewers started warning about downloading FileZilla and discouraged users from using it.[18][19]

In January 2012 gave FileZilla their highest rating of spectacular, 5 out of 5 stars.[16]

FileZilla is available in the repositories of many Linux distributions, including Debian, Ubuntu, Trisquel and Parabola GNU/Linux.[12][13][14][15]

Go Daddy, Clarion University of Pennsylvania and National Capital Freenet recommend FileZilla for uploading files to their web hosting services.[9][10][11]

Writing for Ars Technica in August 2008 Emil Protalinski said: "this week's free, third-party application recommendation is FileZilla.... This FTP client is very quick and is regularly updated. It may not have a beautiful GUI, but it certainly is fast and has never let me down."[8]

In May 2008 Chris Foresman assessed FTP clients for Ars Technica, saying of FileZilla: "Some friends in the tech support world often recommend the free and open-source FileZilla, which offers a Mac OS X version in addition to Windows and Linux. But I've never been thrilled about its busy interface, which can be daunting for novice users."[7]


  • Transfer files in FTP, SFTP, encrypted FTP such as FTPS and SFTP
  • Support IPv6 which is the latest version of internet protocol
  • Available in 47 languages worldwide (Arabic, Armenian, Basque, Bulgarian, Catalan, Chinese, Corsican, Croatian, Czech, Danish, Dutch, German, Greek, Estonian, Finnish, French, Gallegan, Hebrew, Hungarian, Indonesian, Icelandic, Italian, Japanese, Georgian, Khmer, Korean, Kurdish, Kyrgyz, Lithuanian, Latvian, Macedonian, Norwegian, Nepali, Occitan, Persian (Farsi), Polish, Portuguese, Romanian, Russian, Serbian, Slovak, Slovenian, Spanish, Thai, Turkish, Ukrainian, Vietnamese)
  • Supports resume which means the file transfer process can be paused and continued
  • Tabbed user interface for multitasking, to allow browsing more than one server or even transfer files simultaneously between multiple servers.
  • Site Manager to manage server lists and transfer queue for ordering file transfer tasks
  • Bookmarks for easy access to most frequent use
  • Drag & Drop
  • Directory comparison for comparing local files and server files in the same directory. when the file doesn't have the same information (name not match, or size not match) it will highlight that file in colour.
  • Configurable transfer speed limits to limit the speed transferring the files, which helps reducing error of transferring.
  • Filename filters, users can filters only specific files that have the conditions they want.
  • Network configuration wizard, help configuring confusing network settings in form of step-by-step wizard
  • Remote file editing, for quickly edit file on server side on-the-fly. No need to download, edit on the computer and re-upload back to the server
  • Keep-alive, if the connection has been idle for the long time it will check by sending keep-alive command.
  • HTTP/1.1, SOCKS5 and FTP-Proxy support
  • Logging to file
  • Synchronised directory browsing
  • Remote file search to search file on the server remotely.

These are some features of FileZilla.[6]


FileZilla was started as a computer science class project in the second week of January 2001 by Tim Kosse and two classmates. Before they started to write the code, they discussed under which licence they should release the code. They decided to make FileZilla an open-source project, because there were already many FTP clients available and they didn't think that they would sell a single copy if they made FileZilla commercial.[5]


  • History 1
  • Features 2
  • Reception 3
  • Criticism 4
    • Bundled adware issues 4.1
    • Missing password encryption 4.2
  • Release history 5
  • FileZilla Server 6
    • Features 6.1
  • Issues 7
  • See also 8
  • References 9
  • External links 10


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