Free Online CSV to JSON Converter
Convert CSV data to JSON and JSON to CSV with custom delimiters, header options, and pretty formatting. Free online converter tool.
CSV and JSON conversion guides
- Convert CSV to JSONTurn CSV rows into a JSON array of objects and see how quoted commas, doubled quotes, empty cells, numbers and true/false values are converted.
- Convert JSON to CSVConvert a JSON array of objects to CSV: how columns are built from every key, what happens to missing keys and null, and how arrays and nested objects are written.
- Convert TSV to JSONConvert tab-separated values (TSV) copied from Excel or Google Sheets into JSON. Choose the Tab delimiter so commas and semicolons inside cells need no quotes.
Frequently Asked Questions
What does this CSV to JSON converter do?
This tool converts CSV (Comma-Separated Values) data into JSON format and vice versa. You can paste CSV data and get structured JSON output, or paste JSON arrays to get CSV output.
Is my data secure?
Yes! All conversion happens entirely in your browser (client-side). Your data is never sent to any server, ensuring complete privacy and security.
What delimiters are supported?
The tool supports comma (,), semicolon (;), tab, and pipe (|) as delimiters. You can select the appropriate delimiter to match your CSV format.
What happens if my CSV has no headers?
You can toggle the 'First row as headers' option off. When disabled, the tool generates numeric keys (col0, col1, etc.) for each column in the JSON output.
Can I convert JSON back to CSV?
Yes! Switch to the 'JSON to CSV' tab to convert JSON arrays of objects back into CSV format with your chosen delimiter.
Is this tool free to use?
Yes, this converter is completely free with no registration required. Use it as many times as you need.