Network HAR Analyzer
Upload a .har file and see a readable breakdown of every request.
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About this tool
This reads a .har file exported from your browser's DevTools Network tab (right-click the network panel and choose "Save all as HAR") entirely in your browser — the file is parsed with JavaScript on this page and never leaves your device.
It turns the raw HAR JSON into a readable breakdown: total requests, overall time span, bytes transferred over the network and the uncompressed size, a table of every request with its status, timing and size (click a column heading to sort), a per-request DNS/connect/SSL/send/wait/receive timing bar, and a quick list of your slowest requests.