How to generate a HAR file

  • Last update on November 29th, 2023

This article will guide you on how to generate a HAR file with CoreView in Chrome, Firefox, and Microsoft Edge.

1. To generate a HAR file in Chrome:

  1. Navigate to the URL where the issue is occurring.
  2. Right-click anywhere on the page and select “Inspect”. The developer tools will open either at the bottom or the right side of your browser.
  3. Now, click on the “Network” tab.
  4. Click on the record button. Then, force a refresh of the page or click on a link related to the issue. The goal is to reproduce the problem and capture the output.
  5. Once you've reproduced the issue, right-click within the “Network” tab and select “Save as HAR with content”. Then, save the file.
  6. Now, you can upload this output file to your support ticket or attach it to an email response.

To generate a HAR file in Firefox:

  1. Navigate to the URL where you're experiencing the issue.
  2. Go to the “Tools > Web Developer > Network” menu, or press Ctrl+Shift+I (for Windows/Linux) or Cmd+Option+I (for OS X).
  3. Refresh the page to begin capturing the traffic between the browser and the server. Alternatively, click a link related to the issue.
  4. The goal is to reproduce the problem and capture the resulting output.
  5. Click “Export”, followed by “Save as…” to save the HAR file.

To generate a HAR file in Microsoft Edge:

  1. Navigate to the URL where the issue is occurring.
  2. Open “Developer tools” (you can use F12 as a shortcut) and select the “Network” tab.
  3. Refresh the page to begin capturing the traffic between the browser and the server. Alternatively, click on a link related to the issue. The goal is to reproduce the problem and capture the output.
  4. Click on “Export as HAR”, followed by “Save as…” to save the HAR file.