CSV to JSON Converter transforms CSV data into JSON format with automatic type detection. Identifies numbers, detects column types, counts unique values and empty cells per column. Supports both comma and tab separators.
How to use this tool
Paste your CSV data with headers in the first row.
The tool auto-detects comma or tab separator.
See column analysis: type, unique values, empty cells.
Review the formatted JSON output with syntax highlighting.
Copy the JSON for use in your application.
Frequently asked questions
Does the first row need to be headers?
Yes, the first row is used as JSON object keys. Each subsequent row becomes an object with those keys. Without headers, you'd get numeric keys.
How are data types handled?
The tool detects numbers automatically — "42" becomes 42 (number, not string). Empty values become empty strings. For explicit type control, process the JSON output in your code.
Can I convert tab-separated data?
Yes. The tool auto-detects tabs vs commas. If your data has tabs, it uses tab as the separator. This handles data pasted from spreadsheets, which typically uses tab separation.
What about quoted fields with commas?
Standard CSV quoting is handled — fields wrapped in double quotes can contain commas, and they won't be treated as separators. Double quotes within fields should be escaped as "".