CSV to JSON Converter
Convert CSV data to JSON format online
100% Client-Side • Privacy ProtectedFeatures
- Convert CSV to JSON arrays instantly
- Auto-detect delimiters (comma, tab, semicolon)
- Option to use first row as object keys
- Handles quoted fields and special characters
- Download output as .json file
- All conversion happens locally — your data never leaves your device
How to Use CSV to JSON Converter
- 1Paste your CSV data or upload a .csv file
- 2Choose delimiter (or let the tool auto-detect it)
- 3Enable Use first row as keys if your CSV has headers
- 4Click Convert to JSON
- 5Copy or download the JSON output
Frequently Asked Questions
What if my CSV uses tabs or semicolons?
The tool supports comma, tab, and semicolon delimiters. Use the Auto-detect option (default) to automatically identify the correct delimiter, or manually select it from the dropdown.
How are quoted fields handled?
The parser correctly handles fields enclosed in double quotes, including fields containing commas or newlines. Quote characters inside quoted fields should be escaped as double quotes ("").
What does Use first row as keys do?
When enabled, the first row of your CSV is treated as column headers, and each subsequent row becomes a JSON object with those headers as keys. When disabled, each row becomes a simple array.
Can I convert large CSV files?
Yes, the tool can handle large CSV files. However, very large files (multiple megabytes) may slow down your browser. For best performance, ensure your browser has enough memory.
Is my data sent to a server?
No. All CSV parsing and conversion happens locally in your browser. Your data is never uploaded to any server.