CSV to JSON Converter

Convert CSV or TSV data to JSON format with smart type detection. Supports custom delimiters, header rows, value trimming, and instant download.

Convert CSV or TSV data to JSON format with smart type detection. Supports custom delimiters, header rows, and value trimming.

All conversion happens locally in your browser. Numbers and null values are auto-detected. Empty cells become null in JSON output.

How to Use This Tool

  1. 1

    Paste your CSV data

    Enter CSV data with comma, semicolon, tab, or pipe delimiters. Click 'Load Sample' for an example.

  2. 2

    Configure options

    Set the delimiter type, enable/disable headers, trim whitespace, and skip empty lines as needed.

  3. 3

    Convert

    Click 'Convert to JSON' to transform your CSV into a JSON array of objects with auto-detected types.

  4. 4

    Copy or download

    Copy the JSON output to clipboard or download it as a .json file for use in your project.

Frequently Asked Questions

What CSV formats are supported?
The tool supports comma-separated (CSV), semicolon-separated, tab-separated (TSV), and pipe-separated values. Quoted fields with commas inside are handled correctly.
How does type detection work?
Numbers are automatically converted to numeric types. Empty cells become null. All other values remain as strings.
What if my CSV has no headers?
Uncheck 'First Row as Headers' and columns will be named column1, column2, etc. automatically.
Is my data sent to a server?
No. All processing happens entirely in your browser. Your data never leaves your device.