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Speed Test: Check your internet connnection 

Verify the speed of your Swiss internet connection: Perform a speed test for DSL, Cable, Fiber, and Mobile connections to measure the speed and performance of your internet connection.

By using the Internet Speed Test tool provided by, you agree to the terms of use and accept the privacy policy stated on the nPerf website at this page.

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Internet Speedtest

Definition Speed Test: What is an Internet Speed Test?

An internet speed test is an online tool that measures the download speed, upload speed, and latency of an internet connection. Its utility is particularly evident across various types of connections. In the case of fiber optics, characterized by high data transfer speeds, speed tests can confirm the enjoyment of high performance, offering a stable and fast connection. For ADSL connections, often characterized by lower speeds compared to fiber optics, speed tests can highlight limitations in data transmission, helping users understand the actual capacity of their connection. In the context of mobile connections, speed tests are crucial to assess browsing speed on cellular networks, highlighting performance variations based on coverage and network congestion. Additionally, they can be useful for mobile users looking to optimize data usage and ensure a seamless connection experience. In summary, internet speed tests are versatile tools providing crucial information about different types of connections, helping users understand and optimize the performance of their connectivity.

How Does an Internet Speed Test Work and What Does It Measure?

An internet speed test is a service or tool that operates through a series of data transmissions and receptions between the user's device and remote servers. During this process, the test measures various key parameters to assess the user's internet connection performance. An internet speed test works by measuring the download speed, representing the speed at which the device can receive data from the network. It also evaluates the upload speed, indicating how fast the device can send data to the network. Additionally, it measures latency or ping, representing the time it takes for a data packet to travel from source to destination and back. These three parameters are crucial to evaluating the overall performance of an internet connection and are often monitored by users to ensure an efficient online experience.

Title: How to Perform a Speed Test?

To perform a speed test and evaluate the performance of your internet connection, you can follow these general steps:

  • Choose a Speed Test Service: You can use various online speed test services. Some of the most common ones include Speedtest by Ookla,, Nperf's speed test, and Google Speed Test. Visit the website of one of these services to get started.

  • Connect to the Network You Want to Test: Ensure that you are connected to the internet network you want to test. If using a Wi-Fi connection, make sure you are close to the router for more accurate results.

  • Initiate the Test: On the chosen speed test service's website, you will typically find a button or an option to start the test. Click on it to initiate the measurement process.

  • Wait for the Result: The test will measure the download speed, upload speed, and latency of your connection. The process may take a few seconds. Once completed, you will view the results showing your connection's performance in terms of Mbps (megabits per second) for download and upload speeds and in milliseconds for latency.

  • Interpret the Results: The results will display your connection speed based on the measured metrics. You can compare the results with the speed provided by your Internet Service Provider (ISP) and determine if your connection meets expectations.

  • Repeat if Necessary: To get a more accurate picture, you can repeat the test at different times of the day. This may highlight any performance fluctuations due to factors like network congestion.


Remember that results can vary due to factors such as network load, distance from the router, and other devices using the connection simultaneously. A speed test provides a general overview of your internet connection's performance but is only a diagnostic tool and not the sole factor to consider when evaluating connection quality.

How does the Internet Speed Test by work?

The operation of's speed test is straightforward. The free internet speed test offered by provides the opportunity to measure the most important connection performance components with just one click. After that, simply wait for the completion of all measurements and view your connection's performance on the screen. You can share the results via email or another communication channel to keep them.

Why is the Internet Test by Reliable?

The mobile and fiber connection test by is reliable and accurate. This is based on an exclusive algorithm provided by our partner nPerf, capable of determining latency, also known as ping, in addition to download and upload values. Our speed test works with any type of connection, including: ADSL, VDSL, cable, fiber optics FTTH and FTTC, satellite, Wi-Fi, Wimax, and mobiles 2G, 3G, 4G (LTE), 5G. Remember that cannot view, store, or share the results of your speed test, as it does not have access to this data.

Internet Speed Test: How to Interpret the Results

As we've seen, internet speed tests analyze the quality of your connection by checking three main values: download speed, upload speed, and ping. Below, we provide information to understand what optimal values are:

  • Download Speed: Download speed represents the amount of data your device can receive from the internet in a specific period. It is measured in bits per second (bps), kilobits per second (Kbps), megabits per second (Mbps), or gigabits per second (Gbps) depending on the connection speed. In simpler terms, download speed indicates how quickly you can download files, view web pages, watch streaming videos, or perform other activities that involve receiving data from the server to your device. For example, with a download speed of 10 Mbps, your device can download data at a rate of 10 megabits per second. For home internet, a speed of 20 Mbit/s is necessary for general use, while optimal streaming services require speeds around 100 Mbps.

  • Upload Speed: Upload speed is the amount of data your device can send from your location to the internet in a specific period. Similar to download speed, upload speed is measured in bits per second (bps), kilobits per second (Kbps), megabits per second (Mbps), or gigabits per second (Gbps). This metric is crucial for activities that involve sending data to the network, such as uploading files to cloud services, sending emails with attachments, participating in video calls, or uploading content to video-sharing platforms. For instance, with an upload speed of 5 Mbps, your device can send data at a rate of 5 megabits per second.

  • Ping: Also known as latency, ping is the time in milliseconds (ms) that a data packet (also called "ping") takes to reach the signal source and come back. A low ping indicates reduced latency, meaning devices communicate quickly. This value is crucial in situations where even a fraction of a second can make a difference, such as drone piloting or online gaming. For online gaming, optimal latency should be below 10-15 milliseconds (ms), a latency achievable with a good mobile coverage.

What to Do if Speed Test Results Aren't Good

If the results of your internet connection speed test are not satisfactory, you can take some measures to improve performance or troubleshoot any issues. Here are some actions you might consider:

  • Restart Router and Modem: Restart the modem-router to refresh the connection. Turn both off, wait a few minutes, and then turn them back on.

  • Check Physical Connection: Ensure that all cables are properly connected. Check for any damaged cables and ensure that the router/modem is correctly connected to the phone jack or fiber optic.

  • Check for Interfering Devices: Minimize interference from other electronic devices that could impact Wi-Fi connection. Ensure the router is positioned in a central area of your home for better coverage. You might also consider purchasing a Wi-Fi extender to improve signal range in all rooms.

  • Contact Internet Service Provider (ISP): If the problem persists, contact your internet service provider to report the issue. There might be a problem on their network, or they could provide you with specific instructions to resolve the incident.

  • Consider Connection Upgrade: If you need higher performance, consider upgrading your internet connection plan, such as moving to a higher speed. In this case, you can check the best fiber optic subscriptions with our comparator.


Remember, you can always check the Swiss fiber coverage through our guide to see if it has become available at your address.

Best Free Online Speed Tests: Measure Your Internet Speed

  • Developed by JAMOS Web Service GmbH, this tool offers an easy-to-use internet speed test entirely designed with HTML5.

  • Ookla Allows free verification of your internet connection. Ookla also offers a speed test for smartphones, both for Android and Apple iOS devices, allowing you to conveniently measure Wi-Fi and mobile internet connection directly within the application.

  • nPerf: An excellent app for conducting a speed test of your connection. In addition to classic measurements of upload, download, and ping, nPerf also allows testing the connection quality during streaming with three different video qualities (720p). Based on the results collected throughout the calendar year, nPerf compiles a ranking of the best connections for each country.

  • As part of the project, this speed test delivers key connection metrics in under 20 seconds, offering a comprehensive overview of results

  • Offered by the Quality Measurement Internet Access Association (QoS Association), which includes Salt Mobile SA, Sunrise UPC GmbH, and Swisscom (Switzerland) AG, this service has been available since 2021.

  • Widely recognized and partnered with major providers, offers a reliable speed test available in all four official languages of Switzerland.

Which Swiss Providers Offer a Speed Test Service?

In addition to the speed test sites mentioned above, you can also measure the speed of your internet connection by relying on speed tests provided by individual swiss providers. By law, starting from September 2021, internet service providers are required to make this type of tool available in a standardized manner, providing consumers with an unbiased tool to understand if their connection possesses the desired characteristics.

Speed Test Swisscom

Swisscom's Speed Test isn't directly available on the official website. Instead, they guide you through the process and redirect you to cnlab's site, which processes the data.

Speed Test Sunrise

Similarly, Sunrise's speed test isn't conducted on their website. Instead, they offer a detailed explanation of the test's operation and guide you to an app (provided by cnlab) or the website.

Speedtest Salt

Salt has a dedicated webpage with useful advice and information about network speed. If you need to perform a speed test, they suggest relying on Ookla's service, which enables you to test the quality of mobile, DSL, and fiber internet connections.

Speedtest Quickline

Quickline's Speed Test is also an excellent tool to check your connection: When requesting a measurement, the tool calculates the available bandwidth as well as parameters related to latency. The test is available for free on the web and is open to anyone, even non-Quickline customers, and is managed by cnlab.

Speedtest Green

Green relies on Ookla for its internet speed test: By performing the Green Speedtest, available on the company's website, you can evaluate all the parameters of your connection and verify if the bandwidth and latency match what was promised during the contract subscription.

Speedtest iWay

For a quick overview of the performance of your ADSL or fiber, there's the iWay's Speedtest: simply connect via the Ethernet cable, make sure no other devices are connected to the modem on which you want to run the test to avoid bandwidth occupation, and start the speed test. In this case, too, the integrated tool is based on Ookla technology.

Speedtest Teleboy

A speed test takes just a few seconds, and you can get all the answers you're looking for: The Teleboy's Speedtest, (based on Ookla technology) is a fast and efficient tool that reveals the results of your internet connection's download and upload speed and ping time in seconds.

While operators like TalkTalk, Wingo, Yallo and M-Budget don't offer dedicated speed test sections on their websites, you can always utilize our free tool or any of the options listed on this page.

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