HAR File Analyzer
Analyse a HAR export: slow requests, errors, sizes and host breakdowns.
HAR file
Export from DevTools → Network → Save all as HAR. Parsed entirely in your browser.
Drop a file here
Drop a .har file, or paste its JSON below
Analysis
Load a HAR file to see waterfall stats, slow requests, errors and size breakdowns.
About the HAR File Analyzer
Drop a HAR file exported from Chrome, Firefox or Safari DevTools to see total requests, transferred bytes, page load span, average TTFB, failing and redirecting requests, plus size and timing breakdowns by resource type and host. Everything is parsed locally so private headers and cookies never leave your device.
Examples
Chrome export
network-log.harOutput
142 requests, 3.4 MB transferred, avg TTFB 210 msKeyboard shortcuts
- Copy the main outputCtrl / ⌘ + Shift + C
- Download the resultCtrl / ⌘ + S
- Share this toolCtrl / ⌘ + Shift + S
- Reset the inputsAlt + R
- Open the tool search paletteCtrl / ⌘ + K
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Frequently asked questions
Version 1.0.0 · Updated 2026-08-16 · Runs entirely in your browser