Download FileZilla 3.17.0 RC1

A new development version of the open source FTP client FileZilla has been released with version number 3.17.0. FileZilla is small, simple and yet complete. The program is popular due to its low system resource load. However, a common complaint is that passwords are stored unencrypted on the computer. FileZilla is available for Windows, Linux, and OS X, and can be downloaded from this page be downloaded in different versions.

SourceForge, where the downloads are hosted, has been in the news lately because it offers some downloads through its own download manager that contains adware. If the download is less than 1MB in size and has an icon with the letters ‘SF’, you’ve got the wrong one. If the download is about 6MB and there is a FileZilla icon, then you’re good. The following changes and improvements have been made in this release:

New features:

• Recursivly queing local files for upload now displays the progress below the local file list
• MSW: Use dynamic TCP send buffer sizes to improve upload speeds on high-latency connections
• SFTP: Use hardware-accelerated AES on x86_64 CPUs if available by using the AES implementation from Nettle instead of PuTTY
• Building FileZilla now depends on the Nettle library, version 3.1 or later
• Building FileZilla now depends on libfilezilla >= 0.5.0 (

Bug fixes and minor changes:

• MSW: The installer now warns if it detects old versions of FileZilla outside of the installation directory
• Improve compatibility with directory listings where midnight is represented as 24:00:00 of the prior day
• SFTP: Failed downloads due to write failures, eg due to a full disk, no longer show up as successful
• SFTP: Fix transfer failures if multiple transfers try to list the same directory
• SFTP: Updated PuTTY components
• FTP over TLS: Debug logs now contain additional information about the TLS handshake