Online HAR viewer: open .har files exported from browser DevTools — requests grouped by domain, seven-segment timing waterfalls, status distribution, slowest/largest request spotting. Fully local analysis, captures never leave your browser.
TL;DR: Online HAR viewer: domain grouping, seven-segment timing waterfalls, status distribution, local-only analysis.
This tool runs entirely in your browser. Open DevTools → Network panel and search your input — it appears in no request.
FAQ
Chrome/Edge: DevTools → Network → reproduce the flow → right-click the request list → "Save all as HAR with content". Firefox: Network panel gear menu → "Save All As HAR". Then open it here.
Yes — cookies, Authorization headers and request bodies are all in there. This tool parses locally with zero uploads, but sanitize a HAR before sharing it with others.
blocked (queueing) → dns → connect (TCP) → ssl (TLS) → send → wait (TTFB) → receive. Long gray/purple means slow connection setup; long blue wait means server-side latency; long teal receive means big payloads or low bandwidth.
In the HAR spec dns/connect/ssl may overlap (ssl happens inside connect), and cached requests report -1 for phases that never happened. The tool shows raw segment values — for bottlenecks, look at the longest segment.
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