HAR (file format)

JSON-formatted archive file format

The HTTP Archive format, or HAR, is a JSON-formatted archive file format for logging of a web browser's interaction with a site. The common extension for these files is .har.

The specification for the HTTP Archive (HAR) format defines an archival format for HTTP transactions that can be used by a web browser to export detailed performance data about web pages it loads. The specification for this format is produced by the Web Performance Working Group of the World Wide Web Consortium (W3C). This document was never published by the Web Performance Working Group and has been abandoned.

Support

The HAR format is supported by various software, including:

Charles Proxy
Fiddler
Firebug
Firefox
Fluxzy Desktop
Google Chrome
HTTP Toolkit
Internet Explorer 9
Microsoft Edge
Mitmproxy
Postman
OWASP ZAP
Safari

References

External links

W3C HAR editor's draft
What is HAR File And How To Generate HAR File
Make The Web Fast - The HAR Show: Capturing and Analyzing performance data with HTTP Archive format on YouTube
Har viewer on YouTube