HAR Viewer & Waterfall Analyzer
Inspect HTTP Archive (.har) files, diagnose web performance bottlenecks, analyze request waterfall phases, and inspect request/response payloads in your browser.
| Status | Method | Name / URL | Type | Size | Time | Waterfall |
|---|---|---|---|---|---|---|
| Drop a .har file or click "Load Sample HAR" to inspect. | ||||||
Frequently Asked Questions
What does the waterfall chart show?
The waterfall visualizes the chronological progression of every network asset loaded by the page. Colored segments reveal where time is spent: DNS lookup (Cyan), TCP Connect (Orange), SSL Handshake (Purple), TTFB/Wait (Green), and Content Download (Blue).
How can I identify performance bottlenecks in a HAR?
Sort by Time to spot the slowest requests, or look for elongated green segments (high TTFB / slow backend API) or blue segments (large payloads blocking bandwidth).
Does this tool inspect POST/PUT payloads and cookies?
Yes. Clicking on any entry opens a detailed inspector drawer showing complete query strings, form post bodies, JSON payloads, response bodies, and cookie collections.
Are passwords, tokens, or sessions saved or shared?
Never. This application runs completely inside your browser. No data ever leaves your computer.