How are CSV headers used?

The first row becomes JSON object keys unless you disable header mode.

Can JSON arrays of primitives convert to CSV?

Single-column CSV is produced for primitive arrays; objects use keys as columns.

What about empty cells?

Empty CSV cells become empty strings or null depending on the selected option.

CSV JSON Converter

Convert CSV data to JSON or convert tabular JSON data to CSV. Choose the separator, quotation handling, and whether the first row contains column names.

Files and content are processed locally in your browser and are not uploaded to our server.

About this tool

Convert CSV rows into JSON objects using the first row as key names, or turn a list of JSON objects into CSV. Adjust the separator, quotation marks, and column-name settings before copying or downloading the result.

How to use

Convert CSV rows into JSON objects
Convert a list of JSON objects into CSV
Use the first row as key names
Choose comma, semicolon, or tab separators
Copy or download the converted result
Paste or import: Provide CSV text or a file, or paste a JSON list.
Set conversion direction: Choose CSV to JSON or JSON to CSV.
Convert and download: Review the preview and save the result.

Examples

Convert spreadsheet exports for use in an application
Create CSV from a list of JSON records
Move simple table data between two formats
Prepare sample data for testing an import

Limitations

Nested JSON objects are flattened or stringified per cell according to the selected option
Extremely wide CSV may produce large JSON downloads
The entered data is processed directly in your browser and is not sent to a server.

FAQ

How are CSV headers used?: The first row becomes JSON object keys unless you disable header mode.
Can JSON arrays of primitives convert to CSV?: Single-column CSV is produced for primitive arrays; objects use keys as columns.
What about empty cells?: Empty CSV cells become empty strings or null depending on the selected option.