CSV ↔ JSON Converter — Free Online
Free CSV to JSON and JSON to CSV converter. Bidirectional conversion with proper escaping.
CSV Input
JSON Output
🔒100% Private — Your files never leave your device. All processing runs locally in your browser.
How It Works
Choose CSV→JSON or JSON→CSV mode. Paste your data and click Convert. CSV headers become JSON keys; JSON array of objects becomes CSV with headers.
The converter properly handles edge cases like quoted fields, commas within values, newlines inside quotes, and special characters. It produces clean, valid output in both directions — ready to use in APIs, databases, or spreadsheets.
Features
- ✓Bidirectional: CSV→JSON and JSON→CSV
- ✓Automatic header detection from first row
- ✓Proper CSV escaping (quotes, commas, newlines)
- ✓Valid JSON output with proper types
- ✓Copy output to clipboard with one click
- ✓Handles large datasets efficiently
Frequently Asked Questions
Yes, 100% free.