Free HAR file analyzer. Upload HTTP Archive files to view network requests, response times, status codes, and performance bottlenecks. Debug web performance instantly.
The HAR Analyzer on httpstatus.com parses HTTP Archive files exported from Chrome DevTools, Firefox, or Safari and presents a detailed waterfall view of every network request. It calculates total page weight, identifies the slowest resources, flags failed requests and unexpected status codes, and surfaces cache-hit ratios across the session. Drag-and-drop your HAR file to see timing breakdowns for DNS lookup, TCP connect, TLS handshake, server wait, and content download for each entry.
Performance engineers profiling page-load regressions, QA teams attaching network evidence to bug reports, and frontend developers hunting unnecessary API calls all benefit from structured HAR analysis. Processing happens entirely in the browser — your network traces are never uploaded or stored — keeping sensitive authentication headers and cookie values private. This utility complements the Redirect Checker and SSL Checker within the httpstatus.com performance toolkit.