HAR Analyzer
Analyze HTTP Archive (.har) files for performance bottlenecks, HTTP errors, CORS misconfigurations, and auth issues.
Understand what happened on your webpage
Drop a HAR file to inspect requests, responses, timing, errors, and network activity.
Your file is processed locally in your browser — never uploaded or stored.
Drop your HAR file here, or click to choose a file
Accepted formats: .har,.json (max 100MB)
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What you can inspect
- Requests & responses
- API payloads
- Errors & failures
- Timing breakdowns
- Headers & cookies
- Third-party activity
- Potentially sensitive data