Leveraging the awesome WinDivert, clumsy stops living network packets and capture them, lag/drop/tamper/.. the packets on demand, then send them away. Whether you want to track down weird bugs related to broken network, or evaluate your application on poor connections, clumsy will come in handy.
Publisher’s description
What is clumsy?
clumsy is an open-source network tool program for Windows from Chen Tao. It ranks 15th by popularity among network tools in this catalogue. It is written in C.
Installation and requirements
Official installers exist for 64-bit and 32-bit as Portable. It runs without installation (portable).
Popularity and file types
The Chocolatey package has been downloaded 8,134 times. The source code on GitHub (jagt/clumsy) has 6,273 stars. Similar programs include Wireshark, ZeroTier One and Nmap.
Project description on GitHub: “clumsy makes your network condition on Windows significantly worse, but in a controlled and interactive manner.”
Pros / Cons
Pros
- Open source: the code can be inspected and built by anyone
- Portable: runs without installation
- Large user base
Cons
- No native ARM64 build
- No update for more than a year
In short: clumsy is an open-source network tool tool for 64-bit and 32-bit PCs. Updates have slowed down.
Is clumsy safe to download?
- The file is served by github.com, the publisher’s own domain
- The download link uses HTTPS
- A SHA256 hash is published, so you can verify the file:
F50DC734148815831C67D9FC2C246C22D421C53DCEA51E26EEE905B0B2806C27· Open the VirusTotal report for this hash - The link has not been checked yet
- The source code is public
- ExeAtlas does not host, wrap or modify installers
Related guide: How to check a file’s SHA256 hash on Windows
Recent versions
All 1 versions ›| Version | Date | Size | Files |
|---|---|---|---|
| 0.3Latest | October 21, 2023 | — | 64-bit ZIP32-bit ZIP |
Install from the command line
Silent install ›winget install --id Jagt.Clumsy -echoco install clumsy -yscoop install extras/clumsyProgram files (.exe): clumsy.exe
Related guide: How to use winget: install and update apps
Information
- Publisher
- Chen Tao
- Category
- Network tools
- Licence
- MIT
- Price
- Free
- Source code
- github.com/jagt/clumsy
- Written in
- C
- Requires
- Windows 11 / 10
- Architecture
- 64-bit, 32-bit
- Installer
- Portable
- Version
- 0.3
- Released
- October 21, 2023
- Added to the catalogue
- August 13, 2025
- Versions listed
- 1
- Chocolatey downloads
- 8,134
- GitHub stars
- 6,273
- GitHub forks
- 624
- Website
- jagt.github.io
- winget ID
- Jagt.Clumsy
- Chocolatey package
- clumsy
- Scoop package
- extras/clumsy
Ratings and reviews
No reviews yet. Be the first to rate it.
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Frequently asked questions
Is clumsy free?
Yes. clumsy is open-source software under the MIT licence.
Is clumsy safe to download?
The download comes from github.com, which belongs to the publisher; ExeAtlas does not host or change the file. Compare its SHA256 hash with the one shown here, or open the VirusTotal report for that hash.
How do I install clumsy with winget?
Open PowerShell or Windows Terminal and run the winget command shown on this page. winget downloads the official installer and checks its SHA256 hash before running it.
Does clumsy run on ARM (Windows on Arm)?
There is no ARM64 build; Windows 11 on Arm can run the 64-bit and 32-bit version through emulation.
Can I use clumsy without administrator rights?
Yes, it is portable: unpack and run it.
What are alternatives to clumsy?
Wireshark, ZeroTier One, Nmap, iPerf3 and Angry IP Scanner. The alternatives page compares them.
