How are commas inside values handled?

Correctly: CSV wraps such fields in double quotes, and the parser honors quoting and escaping per RFC 4180 — including embedded newlines.

Can I convert an Excel file?

Save or copy the sheet as CSV first (File → Save As → CSV in Excel), then paste it here. Direct .xlsx parsing isn't supported.

CSV ⇄ JSON Converter

Transform CSV or TSV data into a JSON array of objects (using the header row for keys) or flatten a JSON array back into CSV. The delimiter is auto-detected — commas, semicolons, or tabs — and quoted fields with embedded commas and newlines are handled correctly by the battle-tested Papa Parse engine.

Developer Tools

CSV → JSONJSON → CSV

First row is the headerDetect numbers & booleans

CSV input (commas, semicolons, or tabs)

JSON output

Private by default

This tool runs entirely in your browser. Your data is never uploaded to a server.

How to use

4 clear steps.

Choose the direction: CSV → JSON or JSON → CSV.
Paste your data — delimiters are detected automatically.
Toggle whether the first row contains column headers.
Copy or download the converted result.

Good to know

Frequently asked questions

How are commas inside values handled?: Correctly: CSV wraps such fields in double quotes, and the parser honors quoting and escaping per RFC 4180 — including embedded newlines.
Can I convert an Excel file?: Save or copy the sheet as CSV first (File → Save As → CSV in Excel), then paste it here. Direct .xlsx parsing isn't supported.