About CSV to JSON Converter
Convert CSV (Comma-Separated Values) files to JSON (JavaScript Object Notation) format instantly. Our tool supports custom delimiters, automatic type detection, and formatting options for clean, readable output.
Features
- Instant conversion as you type
- Support for multiple delimiters (comma, semicolon, tab, pipe)
- Automatic data type detection (numbers, booleans, strings)
- Header row detection and custom column naming
- Pretty print option for readable JSON
- Upload CSV files directly
- Download converted JSON
- Copy to clipboard with one click
Use Cases
- API Development: Convert CSV data to JSON for API testing
- Data Migration: Transform CSV exports to JSON for databases
- Web Development: Prepare data for JavaScript applications
- Data Analysis: Convert spreadsheet data for processing
- Configuration Files: Create JSON config from CSV
- Testing: Generate test data in JSON format
How to Use
- Paste your CSV data or upload a CSV file
- Select the appropriate delimiter (comma, semicolon, tab, or pipe)
- Check "First row is header" if your CSV has column names
- Enable "Pretty print JSON" for formatted output
- Copy or download the converted JSON
CSV Format
CSV (Comma-Separated Values) is a simple file format used to store tabular data. Each line represents a row, and values are separated by a delimiter (usually a comma).
John Doe,30,john@example.com
Jane Smith,25,jane@example.com
JSON Format
JSON (JavaScript Object Notation) is a lightweight data interchange format that's easy for humans to read and write, and easy for machines to parse and generate.
Supported Delimiters
| Delimiter | Symbol | Common Use |
|---|---|---|
| Comma | , | Standard CSV files |
| Semicolon | ; | European CSV files |
| Tab | \t | TSV (Tab-Separated Values) |
| Pipe | | | Database exports |
Data Type Detection
Our converter automatically detects and converts data types:
- Numbers: Converted to numeric values (e.g., "123" → 123)
- Booleans: "true" and "false" converted to boolean values
- Strings: Text values remain as strings
- Null: Empty values converted to null
Tips for Best Results
- Ensure your CSV has consistent column counts in each row
- Use quotes around values containing delimiters
- Select the correct delimiter for your data
- Enable "First row is header" for better column names
- Use pretty print for readable JSON output
- Test with sample data before converting large files
Privacy & Security
All conversions happen locally in your browser. Your data is never sent to any server, ensuring complete privacy and security. The tool works offline once loaded.