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This file is a format that enables the detection of bottlenecks and vulnerabilities by system experts, developers or security testers.

The HAR file is used to save the information of all web requests made with the browser tab. The extension of the HAR file format is “.har”. In the network environment, when the communication between the sender and the receiver occurs, HAR contains HTTP response and request headers. HAR (HTTP Archive Format) is a JSON archive file format that stores session data over many browsers (IE, Firefox, Chrome, Safari, etc.) between client and server. We will also share with you a step-by-step guide to generate and open a HAR File format, along with some screenshots and explanations.

In this blog post, we will be discussing what HAR file is, what it does and why would you use it.