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/HAR// analyzer

Deep-inspect exported Network logs (.HAR) from your browser DevTools completely offline. Analyze requests, waterfalls, headers, and timings securely inside the DOM block.

Upload HTTP Archive (.HAR)

Export a .HAR file from the Network tab of Chrome or Firefox DevTools. Parsing is 100% offline and secure; your data never leaves your browser.

What is the Offline HAR Network Analyzer?

A zero-trust, client-side HTTP Archive diagnostic utility that visualizes browser network waterfalls, API payloads, and CORS preflight metrics without transmitting sensitive session data to a server.

How it Works under the hood

Instead of uploading the potentially sensitive .har file (which often contains active Session Cookies and Bearer Tokens) to a cloud processor, our engine utilizes pure Client-Side Web Workers. It safely parses the gigabytes of JSON data entirely within the local DOM, reconstructing the network waterfall graphically.

SysAdmin & Security Use Cases

  • »Debug intermittent REST API latency drops by analyzing visual Request Waterfalls.
  • »Audit exposed Authorization Headers and Bearer JS web-tokens in legacy endpoints.
  • »Diagnose WebSocket connection failures, TTFB regressions, and DNS blockages securely.
  • »Map out hidden Shadow IT external requests loaded by third-party tracking scripts.