
Other tools exist, such as the online HAR file viewer. 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.Click on the settings icon in the Developers 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. Load the webpage or site that you want to create a HAR file for. Create HAR files in Mozilla Firefox Use Ctrl-Shift-E to open the Network tab in Firefox, or use Menu > Web Developer > Network to open it.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.

