A HAR (HTTP Archive) file is a JSON-formatted archive file that records a web browser’s interaction with a website. It captures data such as network requests, content of those requests, and timing information. For example, a developer troubleshooting a slow-loading web page might utilize the data within such a file to identify bottlenecks in the loading process, such as large image files or slow-responding servers.
The value of this type of file lies in its detailed record of network performance. It facilitates analysis of website loading issues, allowing for optimization of web performance. Historically, these files emerged as essential tools for web developers as websites became more complex and relied on numerous external resources. Understanding the information contained within these files allows for more efficient website troubleshooting and improved user experience.