What is a HAR File and how to generate one?

A HAR file is a log that records network traffic between a web browser and a server. It can be helpful to investigate and analyse various problems and identify next actions to resolve them.

You can create a HAR file by following these steps from your browser:

• Instructions for Google Chrome
• Instructions for Microsoft Edge
• Instructions for Safari
• Instructions for Firefox

1. Open the site where you're experiencing the issue

2. Right-click the page and select ‘Inspect’, you may need to scroll down to find it

3. Click the 'Network' tab. If you don’t see it, click the two right arrows icon (>>) or the plus icon (+) to find it.
Please note: You must keep the menu open while you reproduce the issue

4. Check the preserve log box, then reload the page (press F5 or 'Ctrl' + 'R')

5. Once the page loads, reproduce the steps before reaching the issue, then click the Export icon

6. Save the HAR file.

Microsoft Edge

1. Open the site where you're experiencing the issue

2. Right-click the page and select ‘Inspect’, you may need to scroll down to find it

3. Click the 'Network' tab. If you don’t see it, click the two right arrows icon (>>) or the plus icon (+) to find it.
Please note: You must keep the menu open while you reproduce the issue

4. Check the preserve log box, then reload the page (press F5 or 'Ctrl' + 'R')

5. Once the page loads, reproduce the steps before reaching the issue, then click the Export icon

Please note: You may need to zoom out (press 'Ctrl' + '-') to see the Export button

6. Save the HAR file.

Safari

1. Open the site where you're experiencing the issue

2. Go to Safari > Settings then navigate to the Advanced tab

3. Check the box "Show features for web developers"

Please note: Steps 2 and 3 are only needed if you haven't already enabled Safari’s Develop menu before

4. Click 'Develop' then 'Connect Web Inspector' (or press 'option' + 'command' + 'I').

5. Click 'Other filter options...'

6. Then select 'Preserve log'

7. Reload the page ('Command' + 'R' on your keyboard).

8. Once the page loads, reproduce the steps before reaching the issue, then click the 'Export' icon

9. Save the HAR File

Firefox

1. Open the site where you're experiencing the issue

2. Press F12 or Right-click the page and select ‘Inspect’, you may need to scroll down to find it

3. Go to the ‘Network’ tab

4. Reload the page (press F5 or 'Ctrl' + 'R')

5. After the page loads, reproduce the steps before reaching the issue, then right-click a request and select ‘Save all as HAR’

6. Save the HAR file.