About CSV to JSON Converter
The CSV to JSON Converter handles bidirectional conversion between CSV (Comma-Separated Values) and JSON (JavaScript Object Notation) formats with intelligent parsing and formatting options.
Upload or paste your CSV data and get properly formatted JSON output instantly. The tool automatically detects delimiters (comma, semicolon, tab) and handles headers, quoted fields, and nested data structures.
Perfect for developers working with APIs, data analysts preparing datasets, and anyone who needs to transform tabular data into JSON format or vice versa.
Common Use Cases
API Development
Convert spreadsheet exports to JSON for REST API consumption. Transform CSV data into properly structured JSON for backend integration.
Database Import/Export
Prepare data for MongoDB, Firebase, or other NoSQL databases. Export JSON data to CSV for analysis in Excel or Google Sheets.
Data Analysis
Transform API JSON responses to CSV for analysis in spreadsheet applications. Create reports from JSON data sources.
Data Migration
Migrate data between systems with different format requirements. Convert legacy CSV files to modern JSON structure.
Frequently Asked Questions
How do I convert CSV to JSON?
Paste your CSV data or upload a CSV file, ensure "First row as headers" is checked if your CSV has headers, and the tool will instantly generate JSON output with each row as an object.
What delimiters are supported?
The tool automatically detects common delimiters including comma (,), semicolon (;), tab, and pipe (|). You can also manually select the delimiter if auto-detection doesn't work for your data.
Can I convert JSON arrays back to CSV?
Yes! Switch to "JSON to CSV" mode and paste your JSON array. The tool will extract all keys as column headers and values as rows. Nested objects are flattened using dot notation.
How are nested JSON objects handled?
When converting CSV to JSON, you can create nested objects using dot notation in headers (e.g., "address.city"). When converting JSON to CSV, nested objects are flattened with dot-separated column names.
Is there a file size limit?
The tool handles files up to 10MB efficiently. For larger files, consider splitting them into smaller chunks. All processing happens in your browser, so performance depends on your device.
🔒 Privacy Note: This tool processes all data locally in your browser. Your CSV and JSON data is never uploaded to any server, ensuring complete privacy for sensitive information.