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BackendsideFTP – Multitasking FTP Client for Windows

A free, robust FTP client built for power users — connect to multiple FTP servers simultaneously in separate MDI windows, manage files and folders, upload and download in dedicated threads, and browse your local drives with a built-in file explorer.

Download Desktop Version 1.0

Free on the Microsoft Store — no subscription, no ads.

Get it from Microsoft

Features

🖥️ Multiple Simultaneous Connections (MDI)

Open multiple FTP sites at the same time, each in its own independent MDI child window. Each connection runs in a dedicated thread — closing a window keeps any in-progress transfers running uninterrupted.

📂 Built-in Local File Explorer

Navigate your local drives without leaving the app. The integrated file explorer shows Desktop, My Computer, and all drive letters with their system icons — making it easy to pick files for upload.

⬆️ Threaded Uploads

File uploads run in a dedicated background thread so the UI stays fully responsive. Real-time bandwidth is calculated and displayed in KB/s while the transfer is in progress, with an abort option at any time.

⬇️ Threaded Downloads

Downloads also run in a separate thread with live KB/s speed reporting and a progress tracker. An overwrite dialog lets you decide what to do when a local file already exists.

🗄️ Saved Site Manager

Save FTP site configurations including hostname, port, username, password, default remote directory, connection type (Active/Passive), and transfer mode (ASCII/Binary). Sites are loaded from a tree view for one-click reconnection.

⚡ Quick Connect

Connect to an FTP server instantly by entering host, port, username, and password without saving a full site profile. Quick-connect sessions can optionally be promoted to saved sites after a successful connection.

📋 Active & Passive Mode

Choose between Active and Passive FTP data transfer modes per connection — essential for working through firewalls and NAT. The mode is configurable per saved site.

🗂️ Remote File & Folder Management

Browse remote directories, create new folders, rename files, delete files and entire folders (with recursive directory deletion), and refresh listings — all from a right-click context menu or toolbar.

🔑 File Permissions (CHMOD)

View and change Unix file permissions directly from the app. A visual permission editor shows read, write, and execute checkboxes for Owner, Group, and Public — generating the correct octal SITE CHMOD command automatically.

🙈 Show/Hide Hidden Files

Toggle visibility of hidden files and folders (those beginning with a dot on Unix servers) via a global option — giving you full control over what's shown in remote directory listings.

🔐 Encrypted Configuration Storage

Saved site credentials and settings are protected using the Windows CryptoAPI (RSA/AES encryption) — your passwords are never stored in plain text on disk.

📝 Color-Coded Activity Log

Every connection window has its own rich-text log showing all FTP commands sent and server replies received. Server responses are shown in blue, errors in red, and general messages in black for easy scanning.

🔃 Sortable Remote File List

Sort remote files by name, size, owner, group, or date modified — click any column header to toggle ascending/descending order. File sizes sort numerically so large files don't appear out of order.

System Requirements: Windows 7 / 8 / 10 / 11  (32-bit or 64-bit)

Screenshots

Main Interface Thumbnail
FTP Browser Thumbnail
Transfer Progress Thumbnail