Observed arrival · 2026-10-26
ExCSV: CSV with its schema in the comments
An extended CSV format that keeps column types, units, statistics, and SQL alongside ordinary CSV rows.
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ƒJS
- For
- People moving tabular exports between tools
- Worth noticing
- Its metadata uses line-oriented key=value comments, keeping the data section ordinary CSV without relying on a nested blob.
Field notes
The example declares date, event, and count columns, adds a PostgreSQL table definition, and records a total in a comment line. The page lists five packaging variants: plain files, sidecars, compressed tables, packed multi-table snapshots, and JSON. It says the ZIP form can expose schema and sums without unzipping, while the packed form targets wide tables and multi-table snapshots.
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Editorial observations of this landing page, not a rating.
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