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HAR File Analyzer

Inspect network waterfalls, timings, and payloads from HAR exports — redact secrets and export cURL, all in-browser.

Data & Markup
Privacy: 100% Client-Side. Your data never leaves this browser tab. Processing uses Web APIs and client-side libraries only.

Drop a HAR file here

Or click to browse · files > 50 MB parse in a Web Worker · 100% client-side

Sample includes secrets so you can try redaction (7.2 KB)

What is a HAR file?

HTTP Archive (HAR) files capture browser network activity: URLs, timings, headers, and bodies. Engineers use them to debug slow pages, failing XHRs, and third-party scripts.

This analyzer renders waterfalls and details client-side and can redact tokens before you share a sanitized export.

How to use this tool

  1. Export a HAR from DevTools and drop it into the uploader.
  2. Explore the waterfall and request/response detail drawer.
  3. Redact secrets if needed, then export CSV or cURL snippets.

Frequently asked questions

Is the HAR uploaded to stbox servers?

No. Parsing and redaction run entirely in the browser.