HAR Viewer
Analyze HTTP Archive files with request waterfall
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HAR (HTTP Archive) is a JSON-based format for logging HTTP transactions between a browser and a server. It captures detailed information about each request and response, including headers, body content, cookies, timings, and status codes.
HAR files are commonly used for:
- Web debugging and troubleshooting
- Performance analysis and optimization
- Network troubleshooting
- API testing and validation
- Browser DevTools export and sharing
HAR Viewer Features
- Request ListView all HTTP requests with status codes and methods
- Detailed ColumnsMethod, URL, type, size, and timing for each request
- Status SummaryOverview of response status codes across all requests
- 100% PrivateFiles processed locally in your browser - never uploaded
HAR Viewer FAQ
What is a HAR file?
HAR (HTTP Archive) is a JSON-based format that records all HTTP transactions between a browser and server. It includes request/response headers, body content, cookies, timings, and status codes.
How do I export a HAR file from Chrome?
Open Chrome DevTools (F12), go to the Network tab, perform the actions you want to capture, then right-click on the request list and select "Save all as HAR with content".
Is my sensitive data safe?
Your files are processed 100% in your browser and never uploaded. However, HAR files can contain sensitive data like cookies, auth tokens, and passwords - always be careful when sharing HAR files.
Can I use it for performance analysis?
Yes! The viewer displays request timings, response sizes, and status summaries, making it easy to identify slow requests, large responses, and failed calls in your web application.