What file formats are supported?

Excel (.xlsx, .xls) and CSV files. You can also paste tab-separated or comma-separated data.

How are headers detected?

The first row is used as column names (keys) in the JSON output.

No, all processing happens in your browser. Your data never leaves your device.

Convert Excel, CSV, or pasted table data to JSON

Upload Excel or CSV File

First row is header

JSON Output

Upload an Excel/CSV file or paste table data directly.

See the parsed table data before conversion.

Click Convert to transform the table to JSON.

Copy the JSON or download as a file.

Convert spreadsheet data to JSON for APIs or databases.

Convert Excel configs to JSON format.

Paste any table data and get JSON instantly.

Transform tabular data for JavaScript applications.