CSV to JSON
Convert CSV data to JSON instantly in your browser. Paste any CSV with a header row and get a clean JSON array of objects
JSON CODE CSV
JSON→CSV CSV→JSON
Tip: paste CSV with a header row on the left — JSON output updates instantly.
Runs 100% Locally in Your Browser
This tool processes your data entirely on your device. Nothing is uploaded, stored, or sent to any server.
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Frequently Asked Questions
What CSV format does the converter expect?
The first row should contain column headers. Each subsequent row becomes an object in the JSON array, with keys taken from the headers.
What delimiter does the CSV parser support?
Comma (,) is the default delimiter. The parser also auto-detects semicolons (;) and tabs when commas are absent, covering most spreadsheet export formats.
How are quoted fields and embedded commas handled?
Fields wrapped in double quotes are parsed correctly even if they contain commas, newlines, or escaped double quotes — following the RFC 4180 standard.
Are numeric values in CSV converted to numbers in JSON?
Yes. Fields that parse as valid numbers are output as JSON numbers rather than strings, keeping the JSON semantically correct.
What happens if a row has fewer columns than the header?
Missing fields are output as empty strings (null in strict mode) so every object always has the same keys.
Is my CSV data sent to a server during conversion?
No. Parsing and conversion happen entirely in your browser — your data is never uploaded, stored, or transmitted.