Packet Sender is a 100% free, open-source network testing tool designed for sending and receiving network packets. The Packet Sender Portable version allows network administrators and developers to run the entire utility directly from a USB drive or local folder without running a formal installation process. Core Networking Capabilities
Multi-Protocol Support: Handles UDP, TCP, SSL, and DTLS connections seamlessly on any user-defined port.
Bidirectional Testing: Functions simultaneously as both a client and a server, allowing you to send custom data payload packets and view incoming network traffic in real time.
Data Format Options: Allows users to define and display data payloads in either ASCII or HEX configurations.
HTTP Client: Includes a built-in feature to safely test HTTP GET and POST requests alongside customized authentication headers. Key Technical Features
Automation Friendly: Features a powerful Command Line Interface (CLI) alongside hotkeys to easily automate script execution.
Intense Traffic Generation: Includes stress-testing tools capable of flooding target devices at specific data rates to check throughput limits.
Panel Generator: Creates complex user interface control panels featuring single-button macro commands to send sequential strings.
Packet Sender Cloud: Provides a free option to save, share, and collaborate on packet sets via public or private URLs.
Built-in Utilities: Contains a helpful IPv4 and IPv6 subnet calculator directly under its tools menu. Common Use Cases
Testing Network APIs: Validates target endpoints by sending raw data strings to active ports.
Firewall Troubleshooting: Verifies end-to-end connectivity by running two independent instances of the software on separate machines.
Malware Analysis: Deploys internal test servers to safely catch and isolate malicious command-and-control network phone-homes.
Device Control: Sends manual hex commands to network-reliant hardware outside of their original proprietary applications. Download and Project Philosophy
The application can be downloaded directly from the official Packet Sender Download Page. Distributed under the GNU General Public License v2, the software strictly operates with zero ads, zero tracking telemetry, and zero third-party software bundles. While completely free for commercial and personal usage, the application operates as donationware to support continued cross-platform development. More technical documentation can be found directly on the Packet Sender Official Site and its Wikipedia Page.
If you would like to proceed with testing your network setup, let me know:
What specific protocol (UDP, TCP, HTTP, etc.) you are planning to test?
Whether you need to test network throughput (stress testing) or simply verify an API connection?
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