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A HAR (HTTP Archive) file captures detailed information about network activity in your browser. It is commonly used by support teams to diagnose website issues such as failed requests or login problems. TU will need to collect a HAR file to provide to our vendor when login or password issues persist in order for the vendor to troubleshoot further.
Before you begin:
- Close unnecessary browser tabs
- Reproduce the issue while recording
- Avoid capturing unnecessary or sensitive information when possible
Google Chrome
- Open Chrome and navigate to the page where the issue occurs
- Press F12 or right-click the page and select Inspect
- Click the Network tab
- Check the box for Preserve log
- Click the Clear button (circle with a line) to start fresh
- Reproduce the issue
- Select the button 'Export HAR (sanitized)'

- Save the file to your computer
- Attach that file your message back to TU support teams
Microsoft Edge
- Open Edge and go to the affected page
- Press F12 or right-click and select Inspect
- Select the Network tab
- Enable Preserve log
- Click the Clear icon to remove existing entries
- Reproduce the issue
- Select the button 'Export HAR (sanitized)'
Save the file to your computer
- Attach that file your message back to TU support teams
Mozilla Firefox
- Open Firefox and go to the page
- Press F12 or right-click and choose Inspect
- Click the Network tab
- Ensure recording is active (red circle in top-left)
- Check Persist Logs
- Click the trash icon to clear logs
- Reproduce the issue
- Right-click in the network panel
- Select Save All As HAR
- Save the file
Safari (macOS only)
Enable Developer Tools (if not already enabled)
- Open Safari
- Go to Safari > Settings (or Preferences)
- Click the Advanced tab
- Check Show Develop menu in menu bar
Capture HAR File
- Open the webpage in Safari
- Click Develop > Show Web Inspector
- Select the Network tab
- Reproduce the issue
- Click the Export icon (or right-click and export)
- Save the HAR file
Troubleshooting Tips
- If no data appears, ensure recording is enabled before reproducing the issue
- Make sure "Preserve log" or "Persist Logs" is selected
- Refresh the page after starting recording