GTmetrix can help you develop a faster, more efficient, and all-around improved website experience for your users. This command allows launching a local HAR Viewer from the command line: This library includes HAR Viewer, which can be launched through a har command. Ruby library to work with and view HTTP archives.
Check also HAR Adopters page.ĭid you also included HAR Viewer into your project? Please, let me know and I'll update the list!
HAR Viewer is an open source released under BSD License and it's already incorporated in to several projects (see the list below). HAR Viewer is also distributed as a Chrome packaged app on the Chrome store ( source available). A custom name of the callback function can be specified in a callback parameter (by default it's onInputData).The link displaying a *.har file (using the viewer) must specify URL of the file in an inputUrl parameter.The Content of a *.harp is HAR enclosed within a callback function.This allows linking your online logs and preview them automatically within the viewer. HAR Viewer supports JSONP and so, it's possible to load log files from different domains. You can remove existing tabs you don't need when embedding HAR Viewer in your system, hide some toolbar buttons that are not necessary in your production releases, etc. HAR Viewer can be customized through available APIs.
You have to also install Firebug extension called NetExport. One of the tools you can use to create a HAR log is Firebug. The result visible on the image corresponds to: $.log.entries Querying HARYou can also create queries based on JSON Query. This way you can easily adapt it when embedding into your system. HAR Files Online HAR Viewer uses JSONP (*.harp) to preview HAR files that are available online even on different domains.Ĭustomize HAR Viewer provides a public APIs that allow you to customize look and feel of viewer's UI. Explore statistics by selecting individual pages (Ctrl + Left Click). Page Load Timeline In case when a single HAR file recorded multiple page loads (or multiple files have been dropped onto the viewer) you can see a timeline of all the page-loads. Statistics HAR Viewer also analyzes the input HAR file and displays some statistics about transferred data. Every bit of information stored in the HAR log is accessible from within the preview. HTTP Request Details Explore details of recorded request. HAR XML Schema is also available (provided by Paul Slauenwhite).ĭrag and Drop In order to preview HAR files you can paste the source into a text box or drop the file directly from you file system on to the page. HAR Viewer Schema You can also see HAR JSON Schema describing its structure and used to validate log files before preview.
* Visibility of individual tabs can be customized HAR File Structure Structure of a HAR file can be displayes as an expandable tree.
HAR Viewer ( HTTP Archive Viewer) is an online tool visualizing HTTP Archive (HAR) files produced by HTTP tracking tools.