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Online HAR File Analyzer & Waterfall Viewer

Upload or paste browser DevTools network .har export files to analyze page load waterfalls, request counts, transfer weights, and HTTP status codes.

↓ Tool Workspace • ↓ Technical Guide • ↓ FAQs |
Load Sample:
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Peer-Reviewed & Verified Estimated Reading Time: 2 mins

Diagnosing Latency Bottlenecks and Slow Network Requests with HAR Files

Web performance optimization requires granular visibility into Time to First Byte (TTFB), DNS resolution, and render-blocking scripts.

Load any DevTools network HAR export to view aggregate stats, status code breakdowns, and sort requests by transfer size or duration.

Frequently Asked Questions

What is a HAR file?

An HTTP Archive (HAR) is a standardized JSON-formatted file exported from browser DevTools containing detailed records of every HTTP request, response, header, and timing breakdown.

Is my HAR file analyzed securely?

Yes. Parsing executes 100% client-side in your browser. Sensitive authentication tokens or cookies inside the HAR are never transmitted to external servers.

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