Article

How do I create a HAR file?

Body

Chrome
Edge
Firefox
Safari

 

Chrome

 

  1. Click on the options menu at the top right corner of your Chrome browser window.
  2. Select More Tools > Developer Tools.
  3. Select Network on the top in the middle. You may need to click  >> and select from a menu.
  4. Tick the Preserve Log checkbox.
  5. Ensure the record icon is red. 
  6. Refresh the page.
  7. Leave this panel open and perform the error prone task.
  8. You will see various columns such as Name, Status, Type etc. populate rows as you do things.
  9. Click the download arrow to Export HAR (sanitized)...
  10. Save the .har file and send it to us.


 

Edge

 

  • Open Microsoft Edge and go to the page where the issue is occurring
  • Click the 3 dots on the top right corner > More Tools > Developer Tools

Then, within the Developer Tools: 

  1. Select the Network panel tab. You may need to click >> and select from a drop down list.
  2. Confirm the Preserve log checkbox is ticked. 
  3. Confirm the record icon is red.
  4. Click Clear network log, refresh the page, and repeat the error prone task.
  5. Click Export HAR to export the recorded session to a HAR file. The icon is an arrow pointing downwards to a horizontal line. It's on the same row as the Preserve log box. If you can't see it, resize the vertical bar and resize the Developer Tools window.

 

 

Firefox

 

  • Open Firefox
  • Go to the page you want to capture
  • Open Developer Tools
    • Windows/Linux: Ctrl + Shift + I
    • Mac: Cmd + Option + I
  • Click the Network tab
  • Click the Settings cog and check “Persist Logs” (important so requests aren’t cleared)
  • Reload the page (Cmd/Ctrl + R)
  • Reproduce the issue or behavior you’re troubleshooting
  • In the Network panel:
  • Right‑click anywhere in the request list
  • Select “Save All As HAR”
  • Save the file

 

 

Safari

One‑time setup (if not already enabled)

  1. Open Safari
  2. Go to Safari → Settings (or Preferences)
  3. Click Advanced
  4. Check “Show Develop menu in menu bar”

 

Capture the HAR file

  1. Go to the webpage you want to record
  2. From the menu bar, click Develop → Show Web Inspector
  3. Open the Network tab
  4. Enable “Preserve Log”
  5. Reload the page
  6. Reproduce the issue
  7. In the Network tab:
    • Click the Export icon or
    • Right‑click in the request list → Export HAR
  8. Save the .har file

 If you don’t see an export option:

  • Make sure requests are visible (reload after opening Network)
  • Ensure you’re on a recent Safari version (Safari 16+)







Title
How do I create a HAR file?
URL Name
How-do-I-create-a-HAR-file

Summary

The article provides a step-by-step guide on creating a .har file in Chrome or Edge, including instructions to access the options menu, select developer tools, and preserve the log.

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