Network Speed Tester

Use Network Speed Tester for macOS and iOS to measure the actual transfer speed of your wifi or wired network. A graph helps you see changes in realtime. Optimize your wifi network by moving or placing your wifi router until you reach the best results.


Example Uses

  • Verify your network components (swiches, router) to find bottlenecks in your wired network
  • Optimize the placement of your wifi router, try different locations until you get the best network performance
  • Measure impact of wifi range extenders
  • Find the best spot for watching streaming movies in your home

Features Overview

  • Accurate performance measuring of your network using client-server technology
  • Get actual realworld network throughput
  • Graphical visualization
  • Find test servers automatically via Bonjour services
  • Export data to tab text format
  • Share results

To make a proper measurement, you need to have either two Macs or one Mac and an iOS device (iPhone/iPad) in your network. One Mac will act as a server, the other device as the client for visualizing the results.

Network Speed Tester is available in English and German language for macOS 10.10 or higher and iOS 9.0 or higher. (for iPhone/iPad and iPod touch)

A client for the AppleTV 4 is coming soon!

Example screenshots

Getting Started & Help

Quick Start: Open the application on two macOS machines on your local network. One will be the server (it doesn’t matter which one), the other one will be the client displaying the results. The name of the respective Mac will show up in the list. On the client Mac, select the server the list and press start to measure. Instead of two Macs, you can also use one Mac acting as the server, and an iOS device for measuring.

If you have only one Mac, you can test against the “default router”. Though, this will be inaccurate, escpecially for fast wired connections. See also below in the FAQ section.

The graph displays the performance results for the past 5 minutes. See how the performance changes while you move your device and wifi router!

To get the most exact results while performing a test, make sure that:

  • no other apps are running that use significant cpu (e.g. converting a video) or network traffic (e.g. copying/downloading files)
  • only one client is using a test server at the same time
  • at least one device is connected directly to the router / wired-network

Please note, that a test automatically stops after 5 minutes to prevent prolongued strain on your network.

Preferences that can be changed in the Mac app:

  • Choose the speed unit for display: MB/s Megabytes per second or MBit/s Megabites per second. Wifi speeds are usually advertised in MBit/s.
  • Disable the built-in test server
  • Set a manual data packet size or use auto mode. (Expert option)

Frequently Asked Questions

Why are the results for the default router so low?
When measuring against the default router, only very little data can be transferred to measure the network throughput. For fast network connections (e.g. wired connections) this results in very inaccurate measurements. For a Wifi network, it can still help to find a better spot for your device or router. Whenever possible, use two machines to do an exact measurement!

My results are way lower than expected / printed on box of router
It is normal, that the actual network performance on a Wifi network is way lower than advertised. The pratical performance is probably 50-60% of the advertised one. Even then, you need to stand in front of your Wifi router to get to the maximum data rate. You can experiment with the placement of your device and router to improve the data rate. Sometimes all it takes is moving your router 10cm or rotating it 90 degrees.

What network port is used for the measuring?
Network Speed Tester uses a TCP connection over port 4138 to measure the performance. If you measure via firewall/NAT, make sure this port is passed through.

The server doesn’t show up even though it is running
Servers are found via Apple’s Bonjour technique. This usually only works on local networks, not when there is a router in between. In these cases, note the address of the server (found in status on the bottom of the window) and add this address manually on the client you are testing from.

What is my current Wifi connection speed?
On the Mac, Option-Click on the Wifi menu. The current used speed is display at “Tx Rate”.

Are there other supported platforms?
The server is for macOS only. Clients are available for macOS and iOS. (Supporting iPhone/iPad/iPod touch)

Can I test external servers or my internet connection?
This tool focuses on point-to-point testing within a wired or wifi network. For internet speed tests, you can use a service like

Version History

V1.1 – 12 April 2017

  • Added support for iOS client app
  • Improved server performance and stability
  • Various bug fixes and smaller improvements

V1.0 – 30 March 2017

  • Initial Version

V1.1 – 21 April 2017

  • bug fixes and small interface improvements

V1.0 – 12 April 2017

  • Initial Version