CSV/JSON Converter - Free Online Data Converter
Options
Input
Drop file here or click to upload
CSV, JSON, TXT (max 10MB)
Output
About CSV/JSON Converter
CSV/JSON Converter is a free online tool that converts between CSV and JSON formats bidirectionally. Instantly convert CSV files to JSON or JSON data to CSV. Perfect for programming, data analysis, and API development. All processing happens in your browser — no data is ever sent to a server.
How to Use
- Paste your CSV or JSON data into the text area, or upload a file
- Select the conversion direction (CSV to JSON or JSON to CSV)
- Click the convert button to see results instantly
- Copy the result or download as a file
Frequently Asked Questions
- What CSV formats are supported?
- Comma-separated, tab-separated, and semicolon-separated formats are supported. Header rows are automatically detected.
- Is there a data size limit?
- Processing happens in-browser, so datasets of up to tens of thousands of rows work smoothly.
- Is my data sent to a server?
- No, all processing happens locally in your browser. No data is ever sent to a server.
- Can nested JSON be converted?
- Yes, nested JSON objects can be flattened and converted to CSV format.