Tool overview
What is HAR Viewer?
A HAR Viewer is a tool that helps you analyze HTTP Archive files with request inspection and filters.
Why use HAR Viewer?
It improves readability and workflow speed when you need to analyze HTTP Archive files with request inspection and filters—entirely in your browser with no server uploads.
Key Features
Instant syntax highlighting and error catching, client-side privacy, and one-click copy for hAR Viewer workflows. Analyze HTTP Archive files with request inspection and filters
How to Use
Follow these steps to get accurate results from the tool interface above.
- Drag and drop a .har file or choose one from disk.
- Filter requests by URL, method, or status family; sort by duration or status.
- Select a row to inspect Overview, Request, Response, Timing, or Raw tabs.
- Copy cURL commands for replay in terminal or API clients.
HAR Analysis Workflow
How to interpret captured network sessions productively.
Timing waterfall
Colored bars break down blocked, DNS, connect, SSL, send, wait, and receive phases per request.
Status filters
Isolate failed requests (4xx/5xx) or slow calls before sharing traces with your team.
cURL export
Rebuild requests with headers and POST bodies for quick reproduction outside the browser.
Frequently Asked Questions
Expandable answers for common debugging bottlenecks and data privacy questions.
Official Documentation & References
Authoritative specifications and platform documentation for this utility.