I Built a JSONL to CSV Converter. Could Developers Test It?

I've been building DataToolForge, a collection of browser-based data utilities.

One tool I'd particularly like feedback on is a JSONL / NDJSON to CSV converter.

It supports:

Flattening nested objects into CSV columns

Preserving arrays as JSON strings

Reporting malformed JSONL records

Local browser processing, without uploading files

Try it: https://datatoolforge.com/tools/jsonl-to-csv

I'd appreciate feedback on three things:

Did the conversion produce the output you expected?

Was anything confusing about the interface?

What would prevent you from using it for a real task?

You can use the built-in example or a small, non-sensitive test dataset.

I'm the developer, and I'm looking for practical feedback rather than promotional reviews. Critical feedback is welcome.