[chanar]

Thanks! Still, no simple solution to do it quickly. Using additional tools needs some sort of technical knowledge.

[majkinetor]

Sort of.

On Windows:

    choco install tad dbeaver postgresql

Tad and dbeaver usable ASAP. PostgreSql requires creating empty database and single table once, with json type column, then insert json each time.

On the more positive side, you have infinitely more capable features in those tools and standard SQL

However, for quick and dirty and ad hoc place, web tool looks like a way to go.

[seektable]

For CSV/TSV files SeekTable can do various reporting (including pivots) really quickly, naturally just in a few clicks.