How to Simulate Packet Loss and Latency on Windows 10?

Are you looking for a Windows Network Tool that can emulate packet-loss and/or latency?

The answer is Clumsy.

Clumsy makes your network condition on Windows significantly worse, but in a managed and interactive manner. It allows you to configure the network latency for the inbound and the outbound connection and you don’t need to install drivers which is great. Many other solutions required installing network drivers. Clumsy supports any protocol based on TCP/IP.

For example, you could use this network tool to test RDP protocol in your LAN because RDP has a low tolerance for packet loss.

The project repository is on github. Clumsy is available for Windows 7 and higher. Clumsy uses the WinDivert library. So I tested Clumsy on Windows 10 Enterprise version and it works like a charm.

How to use Clumsy?

  1. Download and extract the .Zip file.
  2. Now you just need to run “clumsy.exe” and that’s all!

Clumsy will choose which packets to capture by given filter. Below, I select “Lag” with delay greater than 100ms in Outbound direction (Destination Address equals

When I click “Start“, delay time increases immediately.

Second test. Below I select “Drop” to randomly discard packets.

Note that you can also modify lag settings.


Thanks for reading! You can follow me on Twitter @PrigentNico


About Nicolas 270 Articles
I work as an IT Production Manager, based in Paris (France) with a primary focus on Microsoft technologies. I have 10 years experience in administering Windows Servers. . I am a Microsoft MVP for Cloud & Datacenter Management. I also received the PowerShell Hero 2016 award by PowerShell.0rg. And finally, I am "MCSE: Cloud Platform and Infrastructure", "MCSA: Windows Servers", "Administering & Deploying SCCM", and CheckPoint CCSA certified.