The most trusted location is the official GitHub repository by basil00. Releases Page: Navigate to the "Releases" section.

How to Download & Install clumsy 0.4 v2 (Legacy Network Simulation Tool)

: It works even if you are offline or testing connections from your computer to itself ( localhost ).

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.

: Blocks traffic for a period and then releases it all at once in a "burst".

Extract the downloaded ZIP file to any folder on your computer. Run as Administrator: clumsy.exe

Clumsy works by wrapping the WinPcap or Npcap driver to intercept and manipulate network traffic leaving the user's machine.

Clumsy provides an intuitive graphical user interface (GUI) alongside a robust filtering engine. Its core capabilities include:

today from the official GitHub repository and take the first step toward building more resilient, robust, and user-friendly network applications.