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How to generate a HAR file for troubleshooting network issues or slowness

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Gerard Cafaro
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When troubleshooting network issues or slowness, it is sometimes necessary for our Support team to obtain additional information about the network requests that are generated in your browser while an issue occurs. Support may request that you record a HAR file, or a log of network requests, while that issue is occurring and then provide that to them for further analysis.

Note: HAR files may contain sensitive data. They will include the content of the pages loading, cookies, and all information submitted while recording. It is not recommended to view or type passwords or other sensitive data while recording.

 

Generating a HAR file within Chrome and Edge v80+

  1. Open Google Chrome and go to the page where the issue is occurring.

  2. From the Chrome menu bar select View > Developer > Developer Tools (or press F12).

  3. From the panel opens at the bottom of your screen, select the Network tab.

  4. Look for the record button (  ) in the upper left corner of the Network tab. If it is red, then it is already recording. If it is grey, click it once to start recording.

  5. Check the box next to Preserve log:   

  6. Click the Clear button (  ) to clear out any existing logs from the Network tab.

  7. Now try to reproduce the issue that you were experiencing before, while the network requests are being recorded.

  8. Once you have reproduced the issue, press the RECORD button again to stop the recording.
  9. Right click anywhere on the grid of network requests, select Save as HAR with Content, and save the file to your computer.
  10. Upload your HAR file to your ticket for review.

 

Generating a HAR file within IE and Edge pre-v80

  1. Press F12 to open the Developer Tools.

  2. Switch to the Network tab within Developer Tools.

  3. If the play button is already grayed out, then the network trace is already recording. If is it not recording, then press the green play button:

    Not started: 

    Started: 

  4. Reproduce the issue while recording.

  5. Once you have reproduced the issue, stop the recording and save the results as a HAR file (Save icon or CTRL + S).

  6. Upload your HAR file to your ticket for review.

 

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