System Requirements for Mettl Assessment Platform

System Requirements for Mettl Assessment Platform

Mettl test can either be:
  1. Proctored- Using your live-video feed from your integrated webcam/USB webcam, you will be monitored by remote proctors or Mettl’s AI system.
  2. Non- Proctored- No-live video feed is streamed. Hence no monitoring by remote proctors.

With the following basic system requirements checklist, you can ensure that you launch Mettl tests without any difficulty.

1. Network Speed

Mettl requires following minimum upload bandwidth(speed) to run online tests:
For webcam proctored test - 512 kbps
  1. For non-proctored test-256 kbps.
You can check your network speed using the following two websites:

If your network speed is above the advised speed, you should not a face a problem while attempting the test.

2. Supported Browsers

You can attempt Mettl tests on any of the following recommended browsers:


For (Proctored test)

For(Non-proctored test)

Chrome version

63 and above

>20 (32.0.1700.76 is not supported)

Firefox version

52 and above

11 and above

Safari version

12 and above

4 and above

Microsoft Edge

84.0.522.63 and above

84.0.522.63 and above

Mettl Proctored Assessments are not supported on Mobile devices (eg. Cellphone / Smartphones / Pads / Tablets).

Mettl webcam-based proctored test is supported on the following Operating Systems and the respective browser versions:

    a. Windows OS

  1. Firefox: Latest version or Click on the below link to download. 
    Click here to download
  2. Google Chrome: (recommended latest version)
    Click here to download
  3. Microsoft Edge : Latest version or Click on the below link to download.
    Click here to download

    b. Linux OS

  1. Firefox: Latest version or Click on the below link to download.
    Click here to download 

    c. MacOS

  1. Firefox: Latest version or Click on the below link to download.
    Click here to download
  2. Google Chrome: (recommended latest version)
    Click here to download    

3. Browser Settings

Once you have the latest supported browser versions, you may easily start the test. However, in a rare case you may face difficulty in starting the test, due to the pop-up blocker setting of your browser. Here is what you can do to fix this:
  1. Use the “allow once/always” pop-ups function from your browser settings to allow test window to open
  2. Optionally, you may disable the pop-up blocker for the duration of the test. Here is how you can do it:
    1. For Mozilla Firefox on Windows: Go to ‘Tools’ --> Select ‘Options’ --> Click ‘Content’ tab and then uncheck ‘Block Pop-up windows’  check box.
    2. For Google Chrome: Go to ‘chrome://settings/’ --> Click on 'Show advanced settings' (at the end of the page). Under 'Privacy', click on 'Content Settings' --> Under 'Pop-ups', select ‘Allow all sites to show pop-ups’ --> Click on Done.
    3. Microsoft Edge:  Go to 'edge://settings/content/popups' and disable 'Block'.
After performing the above steps, please restart the browser.

 4. Things to remember

  1. Browser Cache Settings

  1.  It is always advisable to clear browser cache/cookies before starting any Mettl tests. For most browsers, pressing “CTRL+SHIFT+DELETE” and selecting Clear Cache (for Firefox and Chrome) helps you clear the cookies.
  1. In case you still face any issue in loading the test, shutdown the system directly using power button and then clear the cache again.
  1. System Updates:

    1. Mettl also recommends to disable security patches, updates of the anti-virus definitions and/or application updates (manually) during the test in order to avoid any interference while taking the test. You can disable automatic system updates for the duration of the test as they may lead to heavy downloads during the test and auto-system restart will hamper your test progress.
    2. To disable System Auto-updates, follow the below steps:
      1. For Windows, Go to ‘Start’ -> ‘Run’ -> Type Services.msc’ and then stop ‘Automatic Updates’ service.
      2. In case you get a prompt that 'Ports 1987 and 1988 have been blocked, please contact your network administrator to assist you with system permissions.

5. Firewall Settings

If you are attempting the test form your office or college premises, it may be possible that there are certain local network restrictions in the network firewall may be preventing the launch of Mettl tests. If you are facing any such issues, please contact your local network administrator and ask them to perform the following actions

Grant necessary firewall permissions to allow all requests from all subdomains of “” in any of the following manner:
  1. If possible allow all access from the network to *
  2. If wildcards are not allowed in the firewall configuration rules, then please allow all access to the domain tabulated below:
    1. *
  3. Unblock the following domains
    1. Domain      : (
    2. Ports TCP : 3478
    3. Ports UDP : 3478 , Range 49152 – 65535
Opening these ports will make the service faster and efficient while giving you better quality images.

For webcam proctored tests, 
  1. Firewall permissions to ports 1987 and 1988 for should be granted i.e. and should be accessible & ensure that you have latest or updated version of Java installed.
  2. Also, make sure that you uninstall any external webcam software (any third party/vendor software) from your system prior to starting the test.
  3. is required, you need to give access to Port 1988