Sometimes Marketo support may request that you capture a HAR file for troubleshooting purposes. This document will explain what this means, what a HAR file is, and how to create/capture one for support (or any other purpose you need them for!)
HAR means 'HTTP Archive Format'. It is a JSON file format which archives the response and request headers from network communications made to and from your browser.
A HAR file (the extension is '.har') saves the information of all web requests which your browser tab makes. Think of it as 'hitting the record button' on your browser session. These files are very useful as they can identify errors, vulnerabilities, or network performance bottlenecks. For some cases with Marketo support it may be necessary to create such a file.
The steps for creating a HAR file vary depending on which browser you are using. Below are the steps for generating a .har file with some commonly used web browsers.
Once you have the .har file, please upload it to the support ticket through the support console so we can take a look and help with your issue.