Developer tools
CSV to JSON converter
Header row becomes keys. Quoted commas survive. Toggle to emit CSV from JSON.
Processed in your browser — nothing is uploaded
A small stateful parser handles quotes. Reverse mode reads an array of objects and writes a header.
Last reviewed 2026-09-10.
FAQ
Questions, answered
Tabs?
This parser is comma-separated. Convert tabs to commas first, or use the markdown table tool for TSV.
Types?
All CSV cells stay strings. JSON numbers stay numbers when going back to CSV via String().
Does my text leave the browser?
No. The CSV/JSON converter runs in JavaScript on this page. Your paste is not uploaded.
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