HTTP Archive (HAR) Network Waterfall Analyzer
Inspect HTTP Archive (.har) network requests, payload sizes, status codes, and waterfall timing locally.
Execution runs 100% locally inside the browser sandbox using HTML5 Canvas, Web Cryptography Subtle API, and Web Workers. No data is ever transmitted across the network.
Zero network latency. Operates completely offline with zero dependencies on third-party backend servers or cloud services.
Built according to official RFC specifications, cryptographic test vectors, and enterprise-grade data transformation standards.
How to Use HTTP Archive (HAR) Network Waterfall Analyzer
Upload your exported browser HAR file or paste the JSON content.
Review request durations, transferred payload sizes, and HTTP status codes.
Identify slow API endpoints and oversized asset transfers.
Frequently Asked Questions
Is my HAR file data private?
Yes, 100% of the HAR JSON parsing and waterfall rendering executes locally inside your browser memory with zero network uploads.
How do I export a HAR file from Chrome or Firefox?
Open DevTools (F12) -> Network tab -> perform your page actions -> right-click any request -> select 'Save all as HAR with content'.
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