How to use Multi-Run HAR Asset Budget Analyzer
- Choose two to five HAR files, or use the shown array of synthetic runs.
- Enter the byte budget you want each run compared against.
- Review unknown sizes, request deltas and overlap before sharing the exported report.
Example: Multi-Run HAR Asset Budget Analyzer
Compare HAR runs by redacted request identity, known transfer bytes, recorded overlap and an entered asset budget.
You add
HAR run files (optional): []
HAR runs (JSON array): "[\n {\n \"log\": {\n \"version\": \"1.2\",\n \"entries\": [\n {\n \"startedDateTime\": \"2026-10-01T10:00:00Z\",\n \"time\": 100,\n \"request\": {\n \"method\": \"GET\",\n \"url\": \"https://example.test/app.js?token=private\"\n },\n \"response\": {\n \"status\": 200,\n \"bodySize\": 1200,\n \"content\": {\n \"size\": 2000,\n \"mimeType\": \"text/javascript\"\n }\n }\n }\n ]\n }\n },\n {\n \"log\": {\n \"version\": \"1.2\",\n \"entries\": [\n {\n \"startedDateTime\": \"2026-10-01T10:00:00Z\",\n \"time\": 80,\n \"request\": {\n \"method\": \"GET\",\n \"url\": \"https://example.test/app.js?token=private\"\n },\n \"response\": {\n \"status\": 200,\n \"bodySize\": 1200,\n \"content\": {\n \"size\": 2000,\n \"mimeType\": \"text/javascript\"\n }\n }\n }\n ]\n }\n }\n]"
Entered transfer budget per run (bytes): 1000000
You get
2 runs compared; 0 exceed the entered known-byte budget.
Options
- Transfer budget
- The budget is your limit. Known bytes can exceed it, while missing sizes prevent a complete total.
- Request matching
- Method, hostname and path identify groups after queries and fragments are removed. Query-distinct requests can therefore share a group.
Supported inputs and limits
Two to five runs; files at most 4 MiB each and 12 MiB total, with 2,000 requests per run. Known response bodySize bytes only. No Lighthouse/Core Web Vitals score, critical-path proof, replay or live account access.
Where your input is processed
This tool processes your input in this browser. Your text and files are not uploaded to UseFreeTools. Check this tool's limits for anything it may save on your device.
A redacted report can still identify private paths
Headers, cookies, bodies, query values and initiators are omitted before export. Hostnames and paths remain useful for comparing assets and can still disclose internal names. Recorded overlap describes request intervals rather than HTTP connection count, and no network replay or performance score is produced.
Questions about Multi-Run HAR Asset Budget Analyzer
Are queries included in the report?
They are removed from exported request identities.
Does unknown size mean zero bytes?
No. Missing transfer sizes remain explicitly unknown.
Does concurrency count TCP connections?
It counts overlapping recorded request intervals.