The strength of Clumsy lies in its granularity. Here is a breakdown of the feature set you should expect in any recent version:
To ensure system safety and get the latest bug fixes, always download Clumsy from authorized repositories.
April 12, 2026 | Category: Development Tools / Network Testing
The text box determines what traffic Clumsy intercepts. If left as all , Clumsy will degrade your entire internet connection, which may disconnect your web browser or voice chat applications. clumsy 04 v2 install download
Clumsy 04 v2 Install & Download: The Ultimate Network Simulation Guide
What (like strict packet drops or fluctuating ping) do you need to simulate?
Now go break your network—intentionally. Your software will thank you for it. The strength of Clumsy lies in its granularity
To ensure system security, it is vital to download Clumsy from verified sources. Because the tool interacts with your network stack, some browsers or antivirus programs may flag it as a "false positive."
Yes, but you must bridge the network adapter and capture on the host’s interface.
Always scope your filters to the specific port of your target application to keep background processes, system updates, and browser tabs running normally. If left as all , Clumsy will degrade
— This usually means that another program is already using WinDivert, or that Windows Filtering Platform is in an inconsistent state. Try closing other network monitoring tools (Wireshark, Fiddler, VPN clients) and restarting clumsy as Administrator.
The most widely used and stable versions are and its various release candidates. There is no official "04 v2" version released by the original developer (jagt) on the official GitHub repository ; users should be cautious of unofficial "v2" or "0.4" downloads from third-party sites, as these may contain malware.
Since it’s portable, simply delete the folder. Also uninstall Npcap from Windows Settings if no longer needed.
Once you have selected your impairments and set your filter, click the button in the lower left corner. Clumsy will immediately begin intercepting and modifying packets according to your configuration. The log panel will display real‑time statistics, including the total number of packets captured and how many were affected by each impairment.