Free, Open-Source Remote Administration Tool for Windows

Quasar is a fast and light-weight remote administration tool coded in C#. The usage ranges from user support through day-to-day administrative work to employee monitoring. Providing high stability and an easy-to-use user interface, Quasar is the perfect remote administration solution for you.

This enhanced version includes remote microphone listening capabilities - stream and record audio from remote systems with a professional, easy-to-use interface.

Please check out the Getting Started guide.

This enhanced version includes a powerful remote microphone listening feature:

• Real-time Audio Streaming - Listen to remote microphone input in real-time
• Audio Recording - Record remote microphone sessions to WAV files
• Independent Controls - Toggle listening and recording independently
• Compact Interface - Clean, professional 300x165px control window
• Server-side Storage - Recordings automatically saved to organized client folders
• High Quality Audio - Supports up to 48kHz sample rate for crystal clear audio
• Concurrent Operations - Listen and record simultaneously without interference

Access the microphone controls through the client context menu after connecting to a remote system.

• TCP network stream (IPv4 & IPv6 support)
• Fast network serialization (Protocol Buffers)
• Encrypted communication (TLS)
• UPnP Support (automatic port forwarding)
• Task Manager
• File Manager
• Startup Manager
• Remote Desktop
• Remote Shell
• Remote Execution
• System Information
• Registry Editor
• System Power Commands (Restart, Shutdown, Standby)
• Keylogger (Unicode Support)
• Remote Microphone Listening (Real-time audio streaming and recording)
• Reverse Proxy (SOCKS5)
• Password Recovery (Common Browsers and FTP Clients)
• ... and many more!

• Latest stable release (recommended)
• Latest development snapshot

• .NET Framework 4.5.2 or higher
• Supported operating systems (32- and 64-bit)
  • Windows 11
  • Windows Server 2022
  • Windows 10
  • Windows Server 2019
  • Windows Server 2016
  • Windows 8/8.1
  • Windows Server 2012
  • Windows 7
  • Windows Server 2008 R2
• For older systems please use Quasar version 1.3.0

Open the project Quasar.sln in Visual Studio 2019+ with installed .NET desktop development features and restore the NuGET packages. Once all packages are installed the project can be compiled as usual by clicking Build at the top or by pressing F6. The resulting executables can be found in the Bin directory. See below which build configuration to choose from.

See CONTRIBUTING.md

See ROADMAP.md

See the wiki for usage instructions and other documentation.

Quasar is distributed under the MIT License.
Third-party licenses are located here.

I really appreciate all kinds of feedback and contributions. Thanks for using and supporting Quasar!