No invented benchmark
The page generates deterministic sample rows in your browser and measures analysis plus CSV generation time on that device.
- 1,000-row test
- 10,000-row test
- No upload
Live browser benchmark
Benchmark JSON to CSV conversion on your own device
Run a transparent synthetic test locally instead of relying on a marketing speed claim. Results depend on your browser and hardware.
What it measures
The benchmark exercises the same parser and CSV generator used by the converter, including nested-field resolution.
Interpret with care
A synthetic test is useful for comparison but does not predict every real file. Shape, field count, browser and device all affect runtime.