09/06/2026
Your UDP Application Isn’t Working. Now What?
Maybe it worked yesterday and something changed—a firewall rule, NAT configuration, network routing, or even a change to the cellular carrier’s internal routing.
Or maybe it never worked.
Either way, you need a way to test UDP communications independently of the application you’re troubleshooting.
That’s why SimpleCom built UDP Test Tool with two separate diagnostic functions in one application.
TRANSMIT — Generate UDP packets and send them to any destination IP address and UDP port, across your local LAN or over the Internet. Create the payload you need, choose the format, send it once or transmit repeatedly.
RECEIVE — Turn your computer into a UDP listener. Bind to a specific local interface and UDP port and see inbound packets arriving from devices, applications, or systems on your LAN or across the Internet.
Use either function independently, whenever and wherever you need it.
Test whether a remote application is accepting UDP traffic. Verify that an IoT device is actually transmitting. Check a firewall or NAT configuration. Validate a new network path. Troubleshoot a cellular connection. Confirm that UDP packets are reaching a specific port.
No scripts. No command line. No complicated setup.
Just two straightforward UDP diagnostic tools in one app.
Transmit. Receive. Troubleshoot.
Available for Windows, macOS and Linux.
And it’s completely free. No trial. No subscription. No locked features. No Pro version.
Download UDP Test Tool from SimpleCom.
Stop Guessing. Start Testing.