The ultimate speed test software for TCP, UDP and SCTP

Iperf (32-bit)

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Download Iperf 3.1.3 (32-bit)

Iperf (32-bit)

  -  1.4 MB  -  Freeware
  • Latest Version

    Iperf 3.1.3 (32-bit) LATEST

  • Review by

    Daniel Leblanc

  • Operating System

    Windows XP / Vista / Windows 7 / Windows 8 / Windows 10

  • User Rating

    Click to vote
  • Author / Product

    Mark Gates / External Link

  • Filename

    iperf-3.1.3-win32.zip

  • MD5 Checksum

    4cb200e1b7324cea59680de8eb4d674f

iPerf is a tool for active measurements of the maximum achievable bandwidth on IP networks. It supports tuning of various parameters related to timing, buffers, and protocols (TCP, UDP, SCTP with IPv4 and IPv6). For each test, it reports the bandwidth, loss, and other parameters. This is a new implementation that shares no code with the original iPerf and also is not backward compatible.

Features and Highlights
  • Measure bandwidth
  • Report MSS/MTU size and observed read sizes.
  • Support for TCP window size via socket buffers.
  • The client can create UDP streams of a specified bandwidth.
  • Measure packet loss
  • Measure delay jitter
  • Multicast capable
  • Client and server can have multiple simultaneous connections (-P option).
  • The server handles multiple connections, rather than quitting after a single test.
  • Can run for a specified time (-t option), rather than a set amount of data to transfer (-n or -k option).
  • Print periodic, intermediate bandwidth, jitter, and loss reports at specified intervals (-i option).
  • Run the server as a daemon (-D option)
  • Use representative streams to test out how link layer compression affects your achievable bandwidth (-F option).
  • A server accepts a single client simultaneously (iPerf3) multiple clients simultaneously (iPerf2)
  • New: Ignore TCP slowstart (-O option).
  • New: Set target bandwidth for UDP and (new) TCP (-b option).
  • New: Set IPv6 flow label (-L option)
  • New: Set congestion control algorithm (-C option)
  • New: Use SCTP rather than TCP (--sctp option)
  • New: Output in JSON format (-J option).
  • New: Disk read test (server: iperf3 -s / client: iperf3 -c testhost -i1 -F filename)
  • New: Disk write tests (server: iperf3 -s -F filename / client: iperf3 -c testhost -i1)
Also Available: Iperf (64-bit) and Iperf for Mac

  • Iperf 3.1.3 (32-bit) Screenshots

    The images below have been resized. Click on them to view the screenshots in full size.

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