CSV to JSON Converter - Free Online Tool

Convert CSV data to JSON format instantly with our free online tool.

👉 CSV to JSON Converter

📚 CSV to JSON Guide

Why Convert CSV to JSON?

JSON is the standard format for web applications and APIs:

• REST APIs - Send data to web services
• JavaScript apps - Native JSON support in JS
• MongoDB - Store directly in document databases
• Configuration - Convert spreadsheet configs to JSON

Example Conversion

CSV:

name,age,city,active
Alice,30,New York,true
Bob,25,Los Angeles,false
Charlie,35,Chicago,true

JSON:

[
  {"name": "Alice", "age": 30, "city": "New York", "active": true},
  {"name": "Bob", "age": 25, "city": "Los Angeles", "active": false},
  {"name": "Charlie", "age": 35, "city": "Chicago", "active": true}
]

Features of Our Converter

• Auto-detect delimiters - Comma, semicolon, tab support
• Type inference - Numbers and booleans converted automatically
• Header detection - First row used as JSON keys
• Large file support - Handles big CSV files efficiently

Code Examples

// JavaScript
function csvToJson(csv) {
  const lines = csv.split('\n');
  const headers = lines[0].split(',');
  return lines.slice(1).map(line => {
    const values = line.split(',');
    return headers.reduce((obj, h, i) => {
      obj[h] = values[i];
      return obj;
    }, {});
  });
}

# Python with pandas
import pandas as pd

df = pd.read_csv('data.csv')
json_data = df.to_json(orient='records')
print(json_data)

Common Use Cases

• Data import - Import Excel/CSV data into web apps
• API payloads - Prepare CSV data for API requests
• Database seeding - Convert spreadsheets to seed data
• Data processing - Transform tabular data for analysis

Try It Now

Convert CSV to JSON instantly - perfect for APIs and web applications.

👉 Convert CSV to JSON