HAR File Viewer

What is a HAR File Viewer?

A HAR (HTTP Archive) file viewer displays and analyzes HTTP Archive files exported from browser DevTools. HAR files contain detailed information about network requests including URLs, headers, responses, timings, and performance data. Viewing HAR files helps debug web applications, analyze network traffic, and optimize page performance.

Why View HAR Files?

HAR file viewing is essential for web development:

• Network Debugging: Debug network requests and API calls
• Performance Analysis: Analyze page load times and resource loading
• Request Inspection: Inspect HTTP headers, responses, and status codes
• Traffic Analysis: Understand network traffic patterns
• Optimization: Identify performance bottlenecks and optimization opportunities

Common Use Cases

Network Request Analysis

Analyze network requests from browser DevTools. View all HTTP requests made by web pages to understand network behavior.

API Debugging

Debug web application API calls. Inspect API requests, responses, headers, and status codes to identify issues.

Performance Optimization

Review network timings and performance data. Identify slow requests, large responses, and optimization opportunities.

Header Inspection

Inspect HTTP headers and responses. Understand request/response headers, cookies, and authentication data.

Web Page Auditing

Audit web page resource loading. Understand which resources are loaded, their sizes, and load times.

HAR File Format

HAR files contain:

• Requests: All HTTP requests made by the page
• Responses: Response data, headers, and status codes
• Timings: Request timing information (DNS, connect, send, wait, receive)
• Headers: Request and response headers
• Cookies: Cookie information
• Content: Response content and sizes

HAR File Viewing Features

Our viewer provides:

• File Upload: Upload HAR files from browser DevTools
• Request List: View all network requests in organized list
• Detailed View: Inspect individual request details
• Header Display: View request and response headers
• Timing Information: Display performance timings
• Search and Filter: Find specific requests quickly

HAR File Best Practices

• Export from DevTools: Export HAR files from browser DevTools
• Privacy: Be cautious with HAR files containing sensitive data
• File Size: Large HAR files may take time to load
• Analysis: Use HAR files for debugging and optimization
• Sharing: Share HAR files carefully (may contain sensitive data)

Privacy and Security

⚠️ Important: HAR files may contain sensitive data including authentication tokens, cookies, and request/response content. Our HAR File Viewer processes files entirely in your browser, but be cautious when sharing HAR files as they may contain sensitive information.

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