What is a HAR File Type?
The purpose of the HAR format is to record the performance of web browsers, allowing developers to analyze how browsers load web pages. HAR files can be exported through various HTTP tools, such as Electron HAR, HttpWatch, HTTP Toolkit, but are usually exported through web browsers. Most browsers support the format including Google Chrome, Mozilla Firefox, Apple Safari, Microsoft Edge and Internet Explorer.
You can open HAR files with different programs, including the online tool HAR Viewer and l' open source, cross-plate-form HTTP Toolkit. Since the HAR files are saved in JSON format, they can also be opened using a JSON editor or plain text editor, such as Microsoft Notepad or Apple TextEdit.
If you open an HAR file in a text editor, you will see JSON organized according to the following types of objects.
The Web Performance Working Group of the World Wide Web Consortium (W3C) develops the HAR format.