CSV to JSON converter

CSV ↔ JSON converter

Output

Convert between CSV (with header) and JSON in both directions. Supports quotes and commas inside fields. Runs entirely in your browser.

This CSV to JSON converter turns CSV into JSON and JSON back into CSV, in your browser.

Two formats, one tool

CSV is ideal for spreadsheets and JSON for programming. Convert between the two in either direction, with header support and no installation required — everything runs locally, so your data never leaves your device.

FAQ

How is a CSV converted to JSON?

The first row is used as the column names, and each following row becomes an object with those fields. The result is a JSON array of objects.

Does it support commas inside values?

Yes. If a field is wrapped in double quotes, the commas and line breaks inside it are preserved, following the standard CSV format.

Is my data uploaded to a server?

No. The conversion happens entirely in your browser.