CSV to JSON Converter
Convert CSV to JSON and back — with quoted fields, custom delimiters, and headers.
CSVJSON
Delimiter
First row is a header
CSV input
JSON output
About CSV to JSON
A CSV to JSON converter turns spreadsheet-style CSV into structured JSON, and back again. Paste CSV to get an array of objects keyed by the header row, or paste a JSON array of objects to get CSV. It correctly handles quoted fields, commas and line breaks inside values, and custom delimiters (comma, tab, semicolon, pipe). Everything runs in your browser — your data is never uploaded.
Frequently asked questions
- How does it handle commas inside a field?
- Fields wrapped in double quotes can contain commas, line breaks, and escaped quotes (""). The parser follows the standard CSV (RFC 4180) rules, so quoted values convert correctly.
- Can I convert JSON back to CSV?
- Yes. Use the swap button to switch direction. Give it a JSON array of objects and it produces CSV, using the union of all keys as the header row.
- What delimiters are supported?
- Comma, tab, semicolon, and pipe. Pick the one that matches your data — tab is useful for TSV files, and semicolon for European spreadsheets.
- Is my data uploaded anywhere?
- No. The conversion happens entirely in your browser with JavaScript; nothing you paste is sent to a server.
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