A small and easy-to-use library to parse HTTP Archive (HAR) format to .NET objects.
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A small and easy-to-use library to parse HTTP Archive (HAR) format to .NET objects.


The HTTP Archive (HAR) format as defined in the W3C Specification is an archival format for HTTP transactions that can be used by a web browser to export detailed performance data about web pages it loads.

So, every modern browser nowadays can export HAR with a lot of information about the user navigation. Chrome, for example, can export HAR from Developer Tools, Network tab, right mouse click and "Copy all as HAR".

What I can do with HAR data? Well, there a lot of things I can imagine right now, like:

  • Web performance tests runners
  • Performance analyzers
  • Navigation visualizers



PM> Install-Package HarSharp


Deserialize from string

var har = HarConvert.Deserialize(harContent);

Deserialize from file

var har = HarConvert.DeserializeFromFile(fileName);

Listing pages load time

var har = HarConvert.Deserialize(harContent);

foreach(var page in har.Log.Pages)
	"Page: {0} loaded in {1} milliseconds", 

Code philosophy

The idea of HarSharp is simplify and promote the use of HAR in .NET codes and keep closest possible to W3C specification , for this reason the below rules were followed during the library development:

  • Keep the entities and properties names equals to the one defined in the specification, but follow the C# naming guidelines, so, "pages" became "Pages".
  • Keep the properties types closest to the spec, but change when there is a better type on .NET side.
    • string (ISO 8601 - YYYY-MM-DDThh:mm:ss.sTZD): System.DateTime (UTC).
    • string (url): System.Uri.
  • Full documentation using citations from W3C specification.
  • StyleCop validation.
  • FxCop Validation.
  • 100% unit test coverage


Having troubles?


  • Serialize HAR entities back to HAR file.

How to improve it?


Licensed under the The MIT License (MIT). In others words, you can use this library for developement any kind of software: open source, commercial, proprietary and alien.