Restricts network traffic by blocking packets for a short period and then sending them in a single batch.
When downloading, be aware that some security software (including QQ Browser and certain antivirus programs) may flag the clumsy executable as “potentially malicious.” This is a false positive caused by clumsy’s deep packet interception behavior — legitimate software that operates at the Winsock layer often triggers heuristic alarms. As long as you download from the official sources, the executable is safe to use.
library to intercept live network packets and apply specific functions to them before they are sent or received. Lag Simulation
is a popular network simulation utility designed for Windows that allows developers and testers to artificially "worsen" network conditions in a controlled, interactive environment . By leveraging the WinDivert library, it captures live network packets and applies various degradations—such as lag, packet loss, or tampering—before sending them to their destination.
Before downloading, ensure your Windows environment meets the necessary criteria for running packet interception tools. clumsy 04 v2 install download
If you enable Clumsy without a filter, or with too aggressive settings, your internet will stop working. Use specific filters.
Injects a fixed or variable delay (in milliseconds) into packet transmissions.
ip.DstAddr == 127.0.0.1 or ip.SrcAddr == 127.0.0.1 Target inbound traffic only: inbound 2. Simulating Common Network Conditions
Once launched, you will see a clean interface divided into a filter input area, functional checkboxes for lag and drop, a start/stop button, and a log output window. Restricts network traffic by blocking packets for a
If you are looking to get the most out of your network emulation, it is highly recommended to and test it on a safe network environment first. If you'd like, I can help you: Create specific filters for gaming or video streaming. Troubleshoot common installation errors.
The safest place to download Clumsy 04 v2 is the official GitHub releases page or the primary developer site (jryans.github.io/clumsy).
Clumsy targets specific network streams using custom filter expressions. If left unfiltered, it will degrade your entire system's internet connection. Preset Filters
Clumsy is a portable application, meaning it does not utilize a standard Windows installer wizard. Right-click the downloaded .zip folder. Select . library to intercept live network packets and apply
: Randomly discards packets based on a specified percentage chance.
: Delays packets for a set amount of time (up to 3,000ms).
Reorders the packet sequence, forcing your application's transport protocol to reassemble the data stream.