HAR File Viewer & Analyzer

Upload or paste HAR (HTTP Archive) files exported from Chrome, Firefox, or Safari DevTools. Analyze request waterfalls, HTTP status codes, latency timings, and response headers 100% locally.

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How to use this tool

Drag and drop a .har file into the upload zone or paste raw HAR JSON text.
Filter requests by HTTP status (2xx, 4xx, 5xx) or resource type (XHR/Fetch, JS, CSS, Media, Fonts).
Review the overall metrics: Total requests, total data transferred, error count, and slowest endpoints.
Click any request row to inspect its full headers, query parameters, timing breakdown, and response body.
Use the search bar to locate specific endpoint URLs or status codes instantly.

Frequently Asked Questions

Are sensitive cookies or credentials in my HAR file kept private?

Yes, 100%. The HAR file is parsed strictly inside your browser memory using HTML5 FileReader. No file content is uploaded to any server, making it safe for confidential network logs.

Where do I get a .har file?

Open Chrome or Firefox DevTools (F12), go to the Network tab, perform your user flow, right-click anywhere in the list, and select "Save all as HAR with content".

Can it parse large HAR files?

Yes. It efficiently processes HAR files up to tens of megabytes directly in client memory.

Comprehensive Guide to the HAR File Viewer & Analyzer

Last Updated: July 30, 2024

What is the HAR File Viewer & Analyzer?

The HAR File Viewer & Analyzer is a specialized, high-performance utility designed to streamline your digital workflow. Upload or paste HAR (HTTP Archive) files exported from Chrome, Firefox, or Safari DevTools. Analyze request waterfalls, HTTP status codes, latency timings, and response headers 100% locally. By offering an intuitive and highly efficient interface, this tool eliminates unnecessary complexity, allowing you to focus directly on getting results quickly and accurately.

Why Use It & Real-World Benefits

Whether you are a professional software developer, a creative web designer, or an everyday student, leveraging reliable, zero-latency tools like the HAR File Viewer & Analyzer can drastically reduce your manual effort. The primary benefit lies in its accessibility—it operates entirely within your browser without requiring heavy software installations or paid subscriptions.

Best Practices & Pro Tips

Always double-check your inputs for accuracy before processing.
Bookmark this page (Ctrl+D / Cmd+D) for instant access in your daily workflow.
Explore our related Network tools below to build a unified productivity ecosystem.

Strict Privacy & Accuracy Statement

As part of our commitment to your digital security, the HAR File Viewer & Analyzer was engineered with a strict 100% privacy-first approach. All processing, calculations, and data formatting happen strictly on the client-side—right within your own web browser window. Your sensitive data, uploaded files, and inputs never leave your device, ensuring you are 100% secure from external server breaches, tracking, or unauthorized logging. We ensure high-fidelity accuracy in all computations, providing you with trustworthy, production-ready outputs.

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