Apps / HAR Detective

HAR Detective

Drag in a browser HAR file for a waterfall and a ranked, plain-English performance report.

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What it does

Finds out why a website feels slow. Save a recording of a page visit from your browser's developer tools (a HAR file), drop it in, and it checks for ten common problems, including repeated calls, missing caching or compression, redirect chains, requests stuck waiting on each other, slow server replies and oversized downloads. Each finding is ranked by impact, shows its evidence and comes with a fix your developer can copy, and the report exports for sharing. The file never leaves your browser.

Good to know

It only looks for these ten known patterns, so problems outside them won't show up.

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