Suppose you have already generated a wult HTML report using the wult report command. There are a couple of ways that you can view this report. See below for details of the options wult offers for viewing reports.

In addition, read this warning for advice on how to securely view wult HTML reports.


As of v1.10.39, 'index.html' files in wult report directories can be used to view wult HTML reports locally and on a web server. Simply open the file in your web browser of choice.

When viewing a report locally, the browser may be unable to read report files due to a security restriction on web browsers. If this happens, the report page will prompt you to upload the report directory to the browser. Following upload, the report should render.

Python Script (

To further facilitate browsing HTML reports, as of v1.10.30, wult HTML reports include a Python script. Note that the script requires that your system already has Python 3.5 or higher installed.

The '' script found in the root directory of wult HTML reports can be used to view one or more reports at the same time. Intended usage is as follows:

  1. Run the script (e.g. by double-clicking on it in Windows Explorer).
  2. Select a directory containing multiple reports when prompted to select a directory.
  3. Once you have finished browsing the reports, make sure to stop the script you started in step 2. If a new terminal window was created when you ran the script in step 2, you can do this by closing this window.

If you want to view many reports in one session, consider passing a parent directory of the reports to ''. This will allow you to navigate in the browser between different reports quicker and without restarting the Python script.

Securely view wult HTML reports

Please consider disabling all untrusted browser extensions while viewing wult HTML reports.

Browser extensions have varying levels of permissions. For example, some extensions require that the user allows them to access and distribute the data they are viewing in-browser. This means that it is possible for some browser extensions to view and share the contents of wult HTML reports.

For Google chrome, you can inspect the permissions of your extensions by visiting chrome://extensions. In Firefox, the same thing can be done at about:addons.