Free HAR Viewer and Analyzer
Analyze a HAR file to inspect network timings, redirects, failed requests, and large downloads. Use the free HAR viewer without uploading your recording.
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How it works
Open your network recording
Export a HAR file from your browser's Network panel, then select it here. You can also explore the included sample without uploading anything.
Analyze network requests
Filter by URL, status, or resource type. Sort by duration or size, and select a request to inspect its headers and timing phases.
Keep the evidence
Copy a request URL or download the filtered summary. Parsing and exporting happen on your device, without sending the recording to our servers.
What is a HAR file?
HTTP Archive (HAR) is a JSON recording of network requests. It can include URLs, headers, cookies, response bodies, and timing data. Prefer a sanitized export when sharing a recording.
Why are some values unavailable?
Not every browser records every timing or transfer size. Missing values are shown as unknown. A long waterfall bar means a longer request, not better performance. Redirect targets are linked only when they are present in the recording.
What can this HAR analyzer diagnose?
Find slow requests, failed responses, redirect chains, and large transfers recorded in your HAR. Filtering and sorting help narrow a browser automation failure; the report does not invent missing timings or identify an unrecorded root cause.
Take your browser workflows to the cloud.
Connect Playwright or Puppeteer to Browser Use and run your automation on managed browsers.