HAR analyzer
Analyze a HAR file in your browser
Drop a Chrome DevTools HAR export to summarize requests, slow endpoints, failures, payload weight, hosts, and sensitive headers. The file stays client-side.
No upload backend
Parsing happens with browser APIs only. For live tab capture, logs, and network requests without exporting HAR files, use DevSnoop.
Capture from Chrome with DevSnoopNo file selected
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requests
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failures
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slow
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0 ms total
Issues
Load a HAR file to see request issues.
Slowest requests
Top hosts
Debug exported sessions
Review HAR files from Chrome, Edge, Playwright, and proxy tools.
Find live capture gaps
HAR export is useful after the fact. DevSnoop lets agents inspect live tabs while coding.
Keep data local
This page avoids runtime backend and LLM costs because analysis happens in the browser.