CSV to JSON Converter

About CSV to JSON Converter

This free online tool converts between CSV (Comma-Separated Values) and JSON (JavaScript Object Notation) formats. All processing happens in your browser — your data never leaves your device.

Features

• Convert CSV to JSON array of objects (with headers) or array of arrays
• Convert JSON back to CSV format
• Support for multiple delimiters: comma, tab, semicolon, pipe
• Handles quoted fields with commas, newlines, and escaped quotes
• Download converted output as a file

What is CSV?

CSV (Comma-Separated Values) is a simple text format for storing tabular data. Each line represents a row, and values are separated by a delimiter (usually a comma). CSV files are widely used for data exchange between spreadsheets, databases, and applications.

Common Use Cases

• Converting spreadsheet exports to JSON for API consumption
• Transforming API JSON responses into CSV for Excel or Google Sheets
• Migrating data between different database formats
• Preparing test data for development
• Converting log files from CSV to structured JSON

FAQ

How does it handle quoted fields?

Fields enclosed in double quotes can contain the delimiter character, newlines, and escaped quotes (doubled: ""). The parser handles all standard CSV quoting rules.

What about nested JSON?

When converting JSON to CSV, nested objects are flattened using dot notation (e.g., address.city). Arrays within objects are converted to JSON strings in the CSV output.