HAR viewer

Inspect a HAR capture — requests, timings, sizes, and status codes summarized per entry.

Open a .har export from browser dev tools and see request counts, total bytes, status breakdown, and top hosts.

The file is parsed in this browser and never uploaded.

How to use

  1. Choose a .har file.
  2. Review the request table and filters.
  3. Read per-entry status, timing, and size to find outliers.

What it supports

HAR 1.2 JSON up to 40 MB / 5,000 entries; shows method, host, path, status, total ms, transferred size, and MIME per entry. Bodies are not decoded. The file never leaves the browser.

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