CSV to JSON Converter (Free)

Converting Data Between Formats

How to Use This Tool

Either upload a CSV file or paste your CSV data into the text area
Set the delimiter (comma, semicolon, tab, etc.) used in your CSV
Choose whether the first row contains headers
Click "Convert to JSON" to process your data
Copy or download the resulting JSON

Understanding CSV and JSON

CSV (Comma-Separated Values)

CSV is a simple file format used to store tabular data, such as a spreadsheet or database. Files in the CSV format can be imported to and exported from programs that store data in tables.

name,age,city
John,28,New York
Sarah,32,Los Angeles
Mike,45,Chicago

JSON (JavaScript Object Notation)

JSON is a lightweight data-interchange format that is easy for humans to read and write and easy for machines to parse and generate. It's based on JavaScript object syntax.

[
  {
    "name": "John",
    "age": 28,
    "city": "New York"
  },
  {
    "name": "Sarah",
    "age": 32,
    "city": "Los Angeles"
  }
]

Features

Multiple Input Methods

Upload CSV files directly
Paste CSV data from clipboard
Edit in the browser before conversion

Customization Options

Custom delimiters (comma, tab, etc.)
Header row detection
Data type auto-detection
Pretty or compact JSON output

Output Options

Copy JSON to clipboard
Download as .json file
Syntax highlighted preview

Common Use Cases

Data Migration

When moving data between systems, CSV and JSON are often used as interchange formats. Converting from CSV to JSON can help when migrating data from spreadsheets or legacy systems to modern web applications or APIs that prefer JSON.

API Integration

Most modern APIs expect data in JSON format. If you have data in CSV format (such as exported from Excel or Google Sheets), you'll need to convert it to JSON before sending it to these APIs.

Data Analysis

While data scientists often work with CSV files, web-based visualization libraries like D3.js expect data in JSON format. Converting your CSV data to JSON makes it compatible with these visualization tools.

Configuration Management

Many applications use JSON for configuration files. If you maintain configuration data in spreadsheets for ease of editing, you can convert the exported CSV to JSON for use in your application.

💡 Pro Tips

Clean your CSV data before conversion to avoid parsing errors
For large files, consider using a desktop application or programmatic conversion
When your CSV has mixed data types, verify that the converter correctly identifies numbers, booleans, etc.
Always validate the JSON output with a JSON validator if you plan to use it in a critical application
Remember that JSON is case sensitive, while CSV headers might not be treated as such in spreadsheet applications

CSV to JSON Converter