During my workflow, I like to keep track of the final size/time values of a few pages of the product that I am working on. Since you have detailed information about their content, you can compare what has improved (or in some cases, not improved) after a new feature is launched or a redesign is completed, for example. HAR files can be useful to collect information about the assets of a page. Using HAR files to analyze the performance of a page What I like about this viewer in particular is the fact you can have multiple files open at the same time, which makes it easier to compare them.
My personal favourite is the one created by Jan Odavarko. Once you have a HAR file, you can try a few HAR viewers online.
#Har file viewer windows#
Close all incognito windows in Google Chrome.It is invaluable to avoid a browser's extensions since they may modify the loading times of a page. Also, it is preferable to audit pages in private windows, which avoids browsers' extensions. It is important to mention here that cookies and form data will also be logged in the file, so be careful to not include sensitive information (personal details, passwords, credit card numbers) while auditing pages. Along with this content, a HAR file will also contain all headers' information and the browser metadata (i.e. It will contain the HTML document and its respective JS and CSS files. What is a HAR file?Ī HAR (short for HTTP Archive) file is a JSON file containing all information about a browser's interactions with a page. So how do we keep track of what is being analyzed by the Network tab? By exporting the page in HAR format. Click on the link/button/tab to have the problem page or action load in the main window. Click the Network tab in the diagnostic window. Go to the page where youre experiencing slowness. Performance improvements are noticeable by changes in your code/environment. Create and view HAR files in supported browsers Chrome 1. Last, but not least, the waterfall column demonstrates when the asset is loaded along with the other requests. The size value will present the gzipped size of the resource (when applicable), while the time column shows the total duration from the start of the request to the receipt of the final byte in the response. The size, time and waterfall columns will be crucial to understanding the performance of a page. You can add more information to this table by right-clicking one of the table headers and choosing other columns. The network tab will give you a table containing all assets loaded on the page, as well as relevant information about their origin (domain, HTTP status code, size), who initiated the request, and the order in which they were loaded in a waterfall representation.
#Har file viewer archive#
Page rendering : incorrect page format, missing informationįirst line troubleshooting can be conducted by following this guide.Performance Issue: slow page load, timeout when performing certain task.HAR files can be a requirement for troubleshooting issues specifically for problems listed below: HAR is the short form for HTTP ARchive format, which tracks all the logging of web browser's interaction with a site.When I consider the performance of a website, the first things that come to mind are looking at the requests of a page, understanding what resources are being loaded, and how long these resources take to be available to users. Providing these information to the support team will help expedite the troubleshooting process. Before you beginĭo take note of the Supported Platforms for the supported browser types. Generate a HAR file for an unaffected page (without performance issue or page rendering issues).Below are guidelines for effective information gathering: It is highly recommended to generate multiple HAR files for comparison. Generate a HAR file for an affected page.Dashboard, Issue View, Issue Search and Project page. Generate multiple times to get the better average and capture the consistent timingīelow is the HAR files generated depending on the browser variant you are using. Safari comes with its own Safari Web Development Tools as described in that link.
#Har file viewer how to#
JavaScript IssuesĪpple have put together a Using the Error Console guide that will detail how to find JavaScript errors.
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