iPerf3 for Windows

Network throughput testing with iPerf3

iPerf3 is a lightweight, free utility for benchmarking the throughput of IP networks. It helps determine the highest data rate a network path can sustain by sending test traffic between endpoints and measuring how much actually passes through.

Which protocols are available

• UDP
• TCP
• SCTP

These protocol options make iPerf3 adaptable to many testing scenarios, from low-latency UDP streams to reliable TCP transfers and SCTP use cases.

What you can tweak

• Buffer sizes
• Protocol-specific flags and modes
• Timing and duration settings

Fine-tuning these parameters allows you to simulate different traffic patterns and stress specific parts of your network stack.

Results and diagnostics

iPerf3 provides detailed output for each run, including throughput, bitrate, and packet loss statistics. The tool presents per-interval and summary measurements so you can analyze transient behavior as well as long-term performance.

Who benefits most

Network engineers, administrators, and anyone responsible for capacity planning or troubleshooting will find iPerf3 useful. Its simple client/server model makes it easy to integrate into test workflows and automated checks.

Why choose it

• Open and free to use
• Straightforward command-line interface
• Produces precise, repeatable measurements

Together, these qualities make iPerf3 a practical choice for quickly assessing and validating network performance.