CSV to JSON Converter

Convert CSV to JSON instantly in your browser. Choose objects or arrays, preview rows, and download JSON fast. Free and private.

How to convert CSV to JSON

  1. Upload your CSV file or try the sample file.
  2. Choose JSON format options and preview the data.
  3. Click convert to download a clean JSON file.

Best for files up to 10MB and up to 50,000 rows.

For larger files, we'll add a large-file option later.

Drag and drop your CSV file here, or

Privacy: Your file stays on your device. We don't upload or store files.

What is CSV to JSON Conversion?

Converting CSV files to JSON format transforms tabular data into a structured format that's ideal for web applications, APIs, and modern data processing. JSON (JavaScript Object Notation) is a lightweight data-interchange format that's easy for both humans and machines to read and write.

Our browser-based converter processes your CSV files locally, ensuring complete privacy. The conversion automatically detects delimiters, handles special characters, and provides flexible output formats to match your needs.

Why Convert CSV to JSON?

  • API Integration: JSON is the standard format for REST APIs and web services
  • Web Applications: JavaScript and modern frameworks work seamlessly with JSON data
  • Data Processing: JSON structures data hierarchically, making complex data easier to work with
  • No Data Loss: Preserves all your CSV data while converting to a more flexible format
  • Privacy First: All conversion happens in your browser - your files never leave your device

JSON Format Options

Our converter offers two JSON output formats:

  • Array of Objects: Each row becomes an object with column headers as keys. Perfect for APIs and databases.
  • Array of Arrays: Maintains the original CSV structure as nested arrays. Useful for data processing and analysis.

You can also choose between compact JSON (single line) or pretty-printed JSON (formatted with indentation) for better readability.

Common CSV to JSON Use Cases

CSV to JSON conversion is essential for:

  • Importing CSV data into web applications and databases
  • Creating API endpoints that accept JSON data
  • Processing data in JavaScript, Python, or other programming languages
  • Building data visualization dashboards
  • Migrating data between systems

How to Use This Converter

Converting your CSV to JSON is simple:

  1. Upload your CSV file using drag-and-drop or the browse button
  2. Review the preview to ensure your data is parsed correctly
  3. Choose your JSON format (objects or arrays) and formatting options
  4. Click "Convert to JSON" to download your file

The converter automatically detects delimiters (comma, semicolon, or tab) and handles quoted values and special characters. For more detailed instructions, see our step-by-step guide.

Common Issues and Solutions

When converting CSV to JSON, you may encounter:

  • Delimiter Issues: Our auto-detection handles most cases, but you can manually select the delimiter if needed
  • Special Characters: The converter properly handles quoted values and escaped characters
  • Large Files: Files over 10MB or 50,000 rows may need to be split for optimal performance

For more help, check out our FAQ section or try our CSV to Excel converter for alternative formats.