CSV to JSON Converter
Convert CSV to JSON format instantly
About this Tool
CSV to JSON Converter is a free, privacy-first tool built for developers. Convert CSV to JSON format instantly
â100% Client-Side: All processing happens in your browser. No data is ever sent to our servers.
âFast & Efficient: Instant results with no server roundtrips or delays.
âFree Forever: No sign-up, no limits, no hidden fees. Use as much as you need.
âFile Support: Upload files directly or paste content. Your choice.
Disclaimer
This tool is provided for informational and educational purposes only. All processing happens entirely in your browser - no data is sent to our servers. While we strive for accuracy, please verify critical data before use in production environments. FormatKit is not responsible for any data loss, corruption, or issues resulting from tool usage.
How to Use CSV to JSON Converter
Upload a CSV file or paste your CSV data (with headers in the first row) into the input field and it will be automatically converted to JSON format. All processing happens in your browser - no data is sent to our servers, ensuring complete privacy.
Features
- Real-time conversion as you type
- Automatic delimiter detection (comma, semicolon, tab) with optional manual override
- Manual delimiter selection: Choose specific delimiter when auto-detect is off
- Header row detection for proper JSON key mapping
- Copy JSON output with one click
- Download as .json file
- Type conversion: Automatically converts numbers and booleans
- Privacy-first: All conversion happens locally in your browser
Common Use Cases
- Data import: Import CSV exports from Excel or Google Sheets into JSON for web applications
- API development: Convert CSV data to JSON for API testing and development
- Database migration: Transform CSV database exports to JSON for NoSQL databases like MongoDB
- Data transformation: Convert spreadsheet data to JSON for JavaScript applications
- Configuration files: Transform CSV configuration data to JSON format
FAQ
Q: Is my data secure?
Yes! All CSV to JSON conversion happens entirely in your browser using client-side JavaScript. Your data never leaves your device and is not sent to any server.
Q: What delimiters are supported?
The converter automatically detects common delimiters including commas (,), semicolons (;), and tabs. Most CSV formats are supported out of the box.
Q: Does the first row need to be headers?
Yes, the converter expects the first row to contain column headers, which will be used as JSON object keys in the output.
Q: Can I convert large CSV files?
Yes! The converter can handle CSV files with thousands of rows. For optimal performance, we recommend files under 5MB.
Q: Are numbers and booleans converted automatically?
Yes! The converter automatically detects and converts numeric values and booleans (true/false) to their proper JSON types instead of treating everything as strings.