CSV to JSON Converter

Why use this?

CSV is the universal format for spreadsheets and exports; JSON is the universal format for APIs and web apps. This converter bridges them so you can move data between Excel or Google Sheets and developers, dashboards, or scripts without fiddly manual reformatting.

Quick tips

• CSV → JSON uses the first row as object keys when header mode is on.
• JSON → CSV works best with an array of objects; keys become the header row.
• Both directions run 100% locally — sensitive spreadsheets never leave your device.
• Bookmark this tool if you move data between sheets and JSON regularly.

Frequently asked questions

How do I convert CSV to JSON?

Paste your CSV data, and the tool converts each row into a JSON object using the first row as keys. The output is a JSON array you can copy straight into your code.

What about JSON back to CSV?

The converter also works in reverse: paste an array of JSON objects and it produces CSV rows with matching column headers.

What CSV dialects are supported?

Standard comma-separated CSV with quoted fields. Values containing commas or quotes are handled correctly as long as they are properly quoted in the source.

What if a JSON object has different keys?

The converter uses the union of all keys as columns. Rows missing a key get an empty cell in the CSV output.