Iperf 2

Throughput testing, latency testing, jitter measurement, packet loss measurement, TCP testing, UDP testing, ECN testing, L4S testing, responsiveness testing, bounceback testing, one-way delay measurement, histogram reporting, multicast testing, IPv6 support, parallel streams, bidirectional testing, full-duplex testing, congestion-control testing, socket pacing, CSV output, embedded systems support

Current release: 2.2.2, July 7, 2026

About iperf 2 and iperf3: Read about the differences between these programs at https://iperf2.sourceforge.io/IperfCompare.html

Man page: https://iperf2.sourceforge.io/iperf-manpage.html

Manual: https://iperf2.sourceforge.io/iperf2-user-manual.html

Features

Throughput testing
Latency and jitter measurement
TCP and UDP performance testing
Packet loss and ECN measurement
Enhanced reporting with RTT, CWND, retries, PPS, and latency metrics
Parallel streams, bidirectional tests, reverse tests, and full-duplex testing
Responsiveness testing with TCP bounceback and latency histograms
One-way delay and trip-time measurement
Multicast, source-specific multicast, IPv4, and IPv6 support
Portable builds for Linux, Windows, macOS, Android, embedded systems, and set-top boxes
See the man page and user manual for more

Project Samples

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edkaczmarek Posted 2024-07-23

Must have tool for multicast testing.
webidsina Posted 2022-07-14

I used this tool to check path bandwidth and it works well even for links with high capacities.
hywelhefin Posted 2020-02-23

I used it to check latency between TCP and UDP for video broadcasting. Iperf2 becomes a perfect choice.
morganlindsey27 Edited 2019-12-12

iPerf is a widely used tool for network performance measurement and tuning. It is significant as a cross-platform tool that can produce standardized performance measurements for any network. more update for imap setting of mail account realmailfix on google search.

1 user found this review helpful.

Additional Project Details

Registered

2014-02-06

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