CSV to JSON Converter Online - Free CSV Data Tool

CSV to JSON Tool

Convert CSV data into clean JSON arrays or JSON objects with delimiter options, header detection, preview and download.

CSV → JSON

This converter runs in your browser. It supports quoted CSV values, commas inside quotes, custom delimiters, header rows and basic type detection.

CSV Input Settings

Upload CSV File Optional. You can also paste CSV below.

Delimiter

Custom Delimiter

First Row

JSON Output

Format

Value Types

Empty Rows

Paste CSV Data

0 Rows

0 Columns

0 KB JSON Size

0 Fields

JSON Output

Conversion Report

Data Preview

No preview yet. Paste CSV and click Convert.

About This Tool

CSV to JSON is a free online data tool that converts CSV data into clean JSON format.

You can paste CSV data or upload a CSV file, choose delimiter, use the first row as headers, output JSON as array of objects or array of arrays, format JSON as pretty or minified and optionally auto-detect numbers and boolean values.

The tool also shows row count, column count, JSON size, data preview and conversion report. You can copy the JSON, download JSON, copy the report or download the source CSV.

This tool is useful for developers, students, data analysts, website owners, API testing, database import preparation and anyone who needs to convert spreadsheet-style data into JSON quickly.

How to Use CSV to JSON

1. Paste CSV data or upload a CSV file.
2. Choose delimiter such as comma, semicolon, tab, pipe or custom delimiter.
3. Choose whether the first row should be used as headers.
4. Choose JSON output mode: array of objects or array of arrays.
5. Choose pretty JSON or minified JSON.
6. Click Convert.
7. Review the JSON output and data preview.
8. Copy or download the JSON file.

Privacy Note: This CSV to JSON Tool works directly in your browser using JavaScript. The CSV data you paste or upload is processed on the page and is not submitted through a form by this tool.

Frequently Asked Questions

Is this CSV to JSON Converter free?

Yes. This CSV to JSON Converter is free to use and does not require signup.

Can I upload a CSV file?

Yes. You can upload a CSV or TXT file, and the tool will read it directly in your browser.

Can I use the first row as JSON keys?

Yes. Choose “Use as headers” and the first row will become the field names for JSON objects.

Does it support semicolon or tab separated files?

Yes. You can choose comma, semicolon, tab, pipe or custom delimiter.

Can I download the JSON result?

Yes. After conversion, you can copy the JSON or download it as a JSON file.

Does this tool upload my CSV data to the server?

No. The CSV conversion is done directly in your browser using JavaScript and the page does not submit your data through a form.