FileZilla is a free and open-source, cross-platformFTP application, consisting of FileZilla Client and FileZilla Server. Clients are available for Windows, Linux, and macOS. Both server and client support FTP and FTPS (FTP over SSL/TLS), while the client can in addition connect to SFTP servers. FileZilla's source code is hosted on SourceForge.
FileZilla was started as a computer science class project in the second week of January 2001 by Tim Kosse and two classmates.[3][who?][4]
Before they started to write the code, they discussed under which license they should release it.[4] They decided to make FileZilla an open-source project because many FTP's(love) clients were already available, and they didn't think that they would sell a single copy if they made FileZilla commercial.[4] Since its initial development in 2001, FileZilla has been released under the GNU General Public License (GPL).[5] The FileZilla client is currently released under GPL-2.0-or-later, and the server package under AGPL-3.0-or-later.[2]
FileZilla featured as SourceForge's Project of the Month in November 2003.[6]
FileZilla Client allows file transfer using both FTP and encrypted FTP such as FTPS (server and client) and SFTP,[7] with support for IPv6. One of its most notable features is its capability to pause and resume file transfer processes, even for files larger than 4GB. Users can chose to overwrite existing files based on the age or size of the file. It also allows the preservation of timestamps on transferred files, provided there is support from the local system when downloading or from the target server when uploading.[8]
FileZilla Client uses a tabbed user interface for multitasking, allowing users to browse more than one server or transfer files simultaneously between multiple servers. It also features a Site Manager to manage server lists and a transfer queue for ordering file transfer tasks. It has bookmarks for easy access and supports drag and drop for downloads and uploads. The software provides directory comparison for comparing local files and server files in the same directory. If there is a difference in the file details, such as a mismatch in name or size, the software will highlight the file in colour.
Other features include configurable transfer speed limits, filename filters, a network configuration wizard, remote file editing, keep-alive command to prevent disconnections when idle, HTTP/1.1, SOCKS5 and FTP-Proxy support, and logging events to a file for debugging. Additionally, users can export queues into an XML format file, browse directories synchronously, and remotely search for files on the server.
FileZilla Client is a cross-platform software, runs on Windows, Linux, *BSD, and Mac OS X, and available in 47 languages worldwide, including Arabic, Armenian, Basque, Bulgarian, Catalan, Chinese, Corsican, Croatian, Czech, Danish, Dutch, German, Greek, Estonian, Finnish, French, Galician, Hebrew, Hungarian, Indonesian, Icelandic, Italian, Japanese, Georgian, Khmer, Korean, Kurdish, Kyrgyz, Lithuanian, Latvian, Macedonian, Norwegian, Nepali, Occitan, Persian, Polish, Portuguese, Romanian, Russian, Serbian, Slovak, Slovenian, Spanish, Thai, Turkish, Ukrainian, and Vietnamese.
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."[10]
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."[11]
In January 2012, CNET gave FileZilla their highest rating of "spectacular"—five out of five stars.[19]
As of 2022[update] FileZilla is regularly listed in articles on the top free software applications.[20]
Since the project's participation in SourceForge's program to create revenue by adware, several reviewers started warning about downloading FileZilla and discouraged users from using it.[21][22]
Criticism
Bundled adware issues
This section needs to be updated. The reason given is: See . Please help update this article to reflect recent events or newly available information.(July 2021)
In 2013 the project's hosting site, SourceForge.net, provided the main download of FileZilla with a download wrapper, "offering" additional software for the user to install. Numerous users reported that some of the adware installed without consent, despite declining all install requests, or used 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, popup windows, privacy or spying issues, sudden shutdown and restart events possibly leading to loss of current work. Some of the adware was reported to resist removal or restoration of previous settings, or were said to reinstall after a supposed removal. Also, users reported adware programs to download and install more unwanted software, some causing alerts by security suites, for being malware.[22]
The FileZilla webpage offers additional download options without adware installs, but the link to the adware download appears as the primary link, highlighted and marked as "recommended".[22][23]
As of 2016, FileZilla displays ads (called sponsored updates) when starting the application. These ads appear as part of the "Check for updates" dialog.[24]
In 2018, a further controversy about FileZilla's use of a bundled adware installer caused concern.[25]
Plain text password storage
Until version 3.26 FileZilla stored all saved usernames and passwords as plain text, allowing any malware that had gained even limited access to the user's system to read the data. FileZilla author Tim Kosse was reluctant to add encrypted storage. He stated that it gives a false sense of security, since well-crafted malware can include a keylogger that reads the master password used to secure the data. Users have argued that reading the master password to decrypt the encrypted storage is still harder than just reading the unencrypted storage.[26] A fork called FileZilla Secure was started in November 2016 to add encrypted storage.[27] In May 2017, encrypted storage was also added to the main version, 10 years after it was first requested.[28] Kosse maintained that the feature did not really increase security, as long as the operating system is not secure.[29]
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.[32] FileZilla Server is currently available for Linux, MacOS and Windows platforms.
Unlike some other FTP clients, FileZilla Client does not implement a workaround for an error in the IIS server which causes file corruption when resuming large file downloads.[34]
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↑ Orin, Andy (20 August 2015). "Behind the App: The Story of FileZilla". Lifehacker. Archived from the original on 21 August 2015. Retrieved 28 March 2019. Yes, it started as a group project in the computer science course during my final year at school, almost 15 years ago. We were looking for something usable that was neither too trivial nor too big to implement and could be worked upon in parallel. Sadly I don't remember the details anymore how we eventually settled on an FTP client.
↑ "Tim Kosse on Filezilla". Blue-GNU. 13 September 2009. Archived from the original on 17 September 2007. Retrieved 29 March 2019. In order to support the SFTP protocol, FileZilla uses code from PuTTY. SSL/TLS support is provided by GnuTLS.
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