CSV to JSON Converter

How CSV to JSON Conversion Works

This converter turns each non-empty CSV row into a JSON object. When the first-row header option is enabled, those values become the object keys. When it is disabled, the tool creates keys such as column1 and column2.

The CSV parser supports quoted fields, delimiters inside quoted fields, escaped double quotes, and line breaks inside quoted values. You can enter a comma, semicolon, tab, pipe, or another delimiter.

All values remain JSON strings. The tool does not guess whether a value is a number, date, or Boolean, so values such as postal codes keep their original text.

How to Use It

1. Paste CSV data or select a .csv file.
2. Enter the delimiter used by the file.
3. Choose whether the first row contains headers.
4. Select Convert.
5. Copy the JSON or download converted.json.

Input Rules and Limits

• Header names must be unique.
• Blank headers are named column1, column2, and so on.
• Missing cells become empty strings.
• Extra cells beyond the available headers are omitted.
• Processing happens in browser memory, so very large files may be slower.

Privacy

Conversion runs locally in your browser. Tool input is not sent to MiniUtil servers.