How do I analyze a HAR file?

Short answer: Load the HAR, sort by failed or slow requests, then inspect status, timing, redirects, payload size, and cache headers for the first broken dependency.

Steps

1. Export the HAR from the browser Network tab without sharing sensitive cookies.
2. Inspect failed requests, long waits, redirects, and unusually large payloads.
3. Compare request headers, response headers, status, and timing phases.
4. Turn the first meaningful failure into a minimal API request or browser reproduction.

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