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

Project Activity

See All Activity >

Follow Iperf 2

Iperf 2 Web Site

Other Useful Business Software

Our Free Plans just got better! | Auth0

With up to 25k MAUs and unlimited Okta connections, our Free Plan lets you focus on what you do best—building great apps.

You asked, we delivered! Auth0 is excited to expand our Free and Paid plans to include more options so you can focus on building, deploying, and scaling applications without having to worry about your security. Auth0 now, thank yourself later.

Try free now

Rate This Project

User Ratings

5.0 out of 5 stars

★★★★★

★★★★

★★★

★★

★

ease 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5

features 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5

design 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5

support 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5

User Reviews

Filter Reviews:

All

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

Similar Business Software

Comet Backup

Start running backups and restores in less than 15 minutes! Fast, secure backup software for businesses and IT providers. Comet is a flexible, all-in-one backup platform available in 13 languages. You choose your backup destination, server location, configuration and setup. Backup to your...

See Software
Network Speed Test

Network Speed Test measures your network delay, download speed and upload speed. Using servers all over the world, Network Speed Test measures your network connection’s latency and throughput. Based on your connection’s speed, Network Speed Test will tell you what activities you might be able to...

See Software
FCC Speed Test

Accurately measure the performance of your mobile broadband service by running active tests to evaluate the following metrics, download and upload speed, latency, jitter and packet loss. You can run these tests over both Wi-Fi and cellular connections. The data from these tests contribute to the...

See Software
V-SPEED

The ultimate fully customizable V-SPEED SPEED TEST application for your website. Easy to install and ready in a few minutes. Measures bandwidth up to Gb/s. Test statistics database, advanced VoIP test, and much more are available. Free bandwidth tester, download & upload tests are instantly...

See Software
Speed Test

Download speed measured in megabits per second (Mbps), how fast your computer can receive data from a server on the Internet. Upload speed, how fast your computer can send data to a server on the Internet. Ping, also known as “latency”, measures the reaction time of your Internet connection by...

See Software
SpeedOf.Me

SpeedOf.Me API, the first and only speed test API, allows you to measure your users' connection speed. SpeedOf.Me is now partnered with NordVPN to offer its users the best quality VPN service at a discounted price. SpeedOf.Me is a broadband speed test that allows you to easily measure your...

See Software