Free CSV to JSON Converter Online
Convert CSV to JSON instantly with our free online tool. Transform CSV data and files to JSON format with automatic delimiter detection and header handling. No signup required.
CSV Input
JSON Output
How to Use
Paste or Upload CSV
Enter your CSV data or upload a .csv file
Configure Options
Choose delimiter and header preferences
Convert
Click convert to transform CSV to JSON
Copy or Download
Copy to clipboard or download as .json file
Smart Parsing
Automatic handling of quoted fields, commas, and special characters
Multiple Delimiters
Support for comma, semicolon, tab, and pipe delimiters
Privacy First
All processing happens in your browser. No data is sent to servers
Frequently Asked Questions
What CSV format is supported?
The converter supports standard CSV format with optional header row. It handles quoted fields, embedded commas, and various delimiters.
How are data types handled?
The tool automatically detects numbers and converts them to numeric types in JSON. Other values are kept as strings.
Is my data secure?
Yes! All conversion happens locally in your browser. Your data never leaves your device.
What if my CSV doesn't have headers?
Uncheck "First row is header" and the tool will automatically generate column names (column1, column2, etc.).