Which JSON shapes convert to CSV?

Use an array of flat objects (e.g., [{"a":1,"b":"x"}, {"a":2,"b":"y"}]). Nested objects are stringified.

How does CSV→JSON work?

The first row is treated as headers. Quoted fields and commas are handled; numbers and booleans are auto-typed if enabled.

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Validate & pretty‑print JSON, convert JSON↔CSV, and preview tables — all in your browser.

JSON

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CSV

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CSV delimiter Auto-type numbers/bools Quote fields

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Why does JSON→CSV require an array of objects?

CSV represents rows. Each object becomes a row; keys become headers. Nested objects are stringified JSON.

How do I force a delimiter?

Set the delimiter to comma, semicolon, or tab (use \t) and reconvert.

How can I preview large files?

The preview shows the first 200 rows for performance. Download will include all rows.