CSV to JSON Converter — Free Online Tool

Convert CSV data to JSON format instantly in your browser. Supports array of objects, array of arrays, and minified output. No upload, no signup, 100% private.

CSV to JSON · TSV to JSON · Semicolon to JSON · 100% Private

Drop a file here or browse

Your data is processed locally and never sent to any server.

JSON Output

[

{

       :         

       :           

}

]

Paste CSV and click Convert to see results

How It Works

1

Paste CSV Data

Paste your comma-separated, tab-separated, or semicolon-separated data into the input box.

2

Choose Format

Select your delimiter and output format: array of objects (keyed), array of arrays, or minified JSON.

3

Copy or Download

Copy the JSON to clipboard or download as a .json file. Ready for APIs, databases, or JavaScript apps.

What is CSV to JSON conversion?

CSV to JSON conversion transforms tabular data stored in Comma-Separated Values format into JavaScript Object Notation (JSON) format. CSV is a flat, row-based format commonly used in spreadsheets and databases, while JSON is a hierarchical, key-value format used extensively in web APIs, JavaScript applications, and modern databases like MongoDB.

When you convert CSV to JSON, each row in the CSV typically becomes an object in a JSON array, with the CSV header row providing the keys. For example, a CSV with headers "name,email,age" and a data row "John,john@example.com,28" becomes the JSON object {"name": "John", "email": "john@example.com", "age": "28"}.

Example: CSV to JSON conversion

Here's a practical example. Starting with this CSV data:

Name,Email,Department
John Smith,john@company.com,Engineering
Jane Doe,jane@company.com,Marketing
Bob Wilson,bob@company.com,Sales

The converter produces this JSON output (array of objects):

[
  {
    "Name": "John Smith",
    "Email": "john@company.com",
    "Department": "Engineering"
  },
  {
    "Name": "Jane Doe",
    "Email": "jane@company.com",
    "Department": "Marketing"
  },
  {
    "Name": "Bob Wilson",
    "Email": "bob@company.com",
    "Department": "Sales"
  }
]

Common use cases

API Development

Convert CSV datasets into JSON format for REST API responses, mock data, or seed data for development and testing.

Database Migration

Transform CSV exports from relational databases into JSON for import into document databases like MongoDB, CouchDB, or Firebase.

Frontend Development

Convert spreadsheet data into JSON arrays for use in React, Vue, or Angular components, data tables, and charting libraries.

Data Analysis

Transform CSV reports from analytics platforms into JSON for processing with Node.js scripts, Python, or data visualization tools.

Why use our CSV to JSON converter?

🔒

100% Private

All processing happens in your browser. Your data never leaves your device.

Instant Results

No upload wait times. Convert thousands of rows in milliseconds.

RFC 4180 Compliant

Properly handles quoted fields, escaped quotes, and special characters.

Frequently Asked Questions

How do I convert CSV to JSON?

Paste your CSV data into the input field, select your delimiter (comma, semicolon, tab, or pipe), choose your output format (array of objects or array of arrays), and click "Convert to JSON". The JSON output appears instantly. You can then copy it or download as a .json file.

Is my CSV data safe when using this converter?

Yes, completely. All conversion happens directly in your browser using JavaScript. Your CSV data is never uploaded to any server, never stored, and never transmitted over the internet. It stays 100% private on your device.

What is the difference between array of objects and array of arrays?

Array of objects uses your CSV headers as JSON keys, producing output like [{"name": "John", "age": 28}]. Array of arrays preserves the raw structure as nested arrays like [["name", "age"], ["John", 28]]. Array of objects is more common for APIs and JavaScript applications.

Can I convert CSV with semicolons or tabs to JSON?

Yes! Select the appropriate delimiter in the settings. The converter supports comma, semicolon, tab, and pipe delimiters. This is especially useful for European CSV files that use semicolons, or tab-separated values (TSV) copied from spreadsheets.

How does the converter handle special characters in CSV?

The converter fully supports RFC 4180 CSV parsing, including quoted fields, escaped double quotes, commas within fields, and multiline values. All special characters are properly preserved in the JSON output with correct escaping.