CSV to JSON Converter
Convert CSV to JSON and JSON to CSV online. Supports headers, custom delimiters, and auto type detection. Free online tool.
About this tool
Transform CSV tables into JSON arrays of objects (and back). Headers become keys, and values are type-detected when possible.
Example use case: Convert a spreadsheet export into JSON for seeding a database or mock API.
Input (CSV)
Output (JSON)
Frequently Asked Questions
How do I convert a CSV file to JSON?▾
Paste your CSV content (with headers in the first row) into the input field and click Convert. The tool automatically detects headers and converts each row into a JSON object. Numbers and booleans are automatically typed.
Does the CSV converter handle quoted fields?▾
Yes. Fields wrapped in double quotes are handled correctly, including fields that contain commas, newlines, or double quotes inside them (escaped as "").
What delimiters are supported?▾
The tool supports comma (,), semicolon (;), tab (\t), and pipe (|) delimiters. You can select the delimiter in the options panel.
Does CSV to JSON preserve data types?▾
Yes. The converter automatically detects and converts numbers, booleans (true/false), and null values. Text remains as strings. This produces cleaner JSON than treating all values as strings.