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HAR Performance & Privacy Analyzer

Parse HAR files locally to inspect requests, domains, timing, size, and failures. Detect tokens, cookies, sensitive headers, query parameters, and bodies, then export a sanitized copy.

HAR data is parsed and sanitized in a local Worker and is never uploaded. Raw logs may contain credentials, so export only the sanitized version.
or paste HAR JSON

About HAR Performance & Privacy Analyzer

Analyze the network waterfall and remove secrets before sharing. Parse HAR files locally to inspect requests, domains, timing, size, and failures. Detect tokens, cookies, sensitive headers, query parameters, and bodies, then export a sanitized copy. The core workflow is designed to run in your current browser.

Key capabilities

  • Filter the request waterfall by method, status, domain, and URL
  • Flag failed, slow, large, and redirected requests
  • Detect sensitive headers, cookies, query values, bodies, JWTs, and emails
  • Export shareable copies and reports from sanitized data only

Useful for

  • Investigate API failures and unusual network requests
  • Find slow requests and oversized resources
  • Remove credentials and personal data before sending a HAR to others

Frequently asked questions

Is HAR Performance & Privacy Analyzer free to use online?

Yes. HAR Performance & Privacy Analyzer opens in a modern browser and does not require desktop software installation.

What is HAR Performance & Privacy Analyzer useful for?

Common use cases include Investigate API failures and unusual network requests; Find slow requests and oversized resources.

Is my input or file uploaded?

The core processing workflow is designed to run locally in the browser. Key capabilities include Filter the request waterfall by method, status, domain, and URL, Flag failed, slow, large, and redirected requests, Detect sensitive headers, cookies, query values, bodies, JWTs, and emails; account, comments, and anonymous analytics may still create normal site requests.

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