How do I generate a HAR file?

What is a HAR file?

HAR stands for HTTP Archive and is a container for lots of trace information from within a browser. It records all web requests made by the browser tab, including the request & response headers, the body and the time it look to load. This makes HAR files very useful when troubleshooting issues relating to speed, caching and issues which are harder to replicate.

How to generate one

1. The easiest way to generate one is by using Chrome as the feature is built in, so start by open Chrome. If you do not have Chrome you can download a copy here.

2. In Chrome browse to the URL where you are seeing the issue.

3. Right click anywhere on the page and click on Inspect Element

4. The developer tools should have opened at the bottom of the browser, now click on the Network tab

5. Click on the record button and force a refresh of the page by pressing Ctrl + F5 (Cmd+Shift+R for Mac), or click on a link with which you are seeing the issue. The aim is to reproduce the issue and capture the output. 

6. Once you have experienced the issue right click within the Network tab and select "Save as HAR with Content" then save the file.

 7. Now you can upload the output file to your support ticket or attach it to an email response.