It will now allow you to View your HAR file. Other tools exist, such as the online HAR file viewer. First, you need to add a file for Viewer: drag & drop your HAR file or click inside the white area for choose a file. You find import HAR file options under Network in those browsers, and may use the imported data to analyze potential site issues. HAR files can be loaded in most browsers that support creating them. Click on the settings icon in the Developer's Tools bar (that looks like a Sun), and select Save all as HAR to export the data.Load the webpage or site that you want to create a HAR file for.Use Ctrl-Shift-E to open the Network tab in Firefox, or use Menu > Web Developer > Network to open it.The same method works in most Chromium-based web browsers including Brave, Opera, Vivaldi or Microsoft Edge. Activate the down arrow icon in the toolbar, it displays Export HAR when you mouse over, to save the HAR file to the local system.Load the page or site in question, if it is already open, use the reload button in the interface.Switch to the Network tab in the Developer Tools interface.If you open a HAR file in a text editor, you will see the. Since HAR files are saved in JSON format, you can also open them using a JSON editor or a plain text editor, such as Microsoft Notepad or Apple TextEdit. Use the keyboard shortcut Ctrl-Shift-I to open the Developer Tools, or select Menu > More Tools > Developer Tools. You can open HAR files with various programs, including the online HAR Viewer tool and the open source, cross-platform HTTP Toolkit.Generally speaking, it is necessary to open the Network Tools of the Developer Tools of the browser that is being used, load the site in question (or part of it depending on the issue), and use a save option to save the recorded data as a HAR file. Anyone can create a HAR file using web developer tools and send the file to the developer after its creation for analysis.

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