HAR request analyzer

Inspect a local HAR 1.2 archive without replaying requests. Summarize recorded timings, statuses and response-body sizes, and rank the slowest entries.

01 Input

YOUR INPUT

02 Output

LOCAL RESULT

QUICK GUIDE / 31

How to use

Paste HAR JSON or choose a local HAR file. Load example restores the sample JSON.
Review the options and select Run tool. No input is sent to a server.
Durations are summed across requests, including overlapping ones; they are not page-load time. A selected file takes precedence over pasted JSON.
Inspect the result, then copy or download it. Clear removes visible inputs and output.

A worked example

Load example restores these values.

HAR JSON:
{"log":{"version":"1.2","entries":[{"request":{"method":"GET","url":"https://example.com/api"},"response":{"status":200,"bodySize":1200},"time":125},{"request":{"method":"GET","url":"https://example.com/app.js"},"response":{"status":404,"bodySize":300},"time":25}]}}

Expected result

Requests: 2
HTTP errors (400–599): 1
Sum of recorded durations: 150 ms
Known response-body bytes: 1500

Scope & limitations

HAR 1.2 entry subset only, maximum 10,000 requests and 2 MiB files. Unknown body sizes (-1 or absent) are counted separately; sensitive URLs in HAR files remain visible in the local report. No archive content is fetched. JSON numbers use JavaScript binary64 precision; keep large exact identifiers as strings. Numeric overflow is rejected.

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HAR request analyzer

01 Input

02 Output

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