This online tool converts CSV to JSON. You may also convert XLSX (Excel files) to JSON here as well. The first row of the CSV file must contain column headers. Place double underscore within the column header name to create nested data. For example HeaderTitle__ChildData__SomeAttribute.

 This tool transforms Comma Separated Values (CSV) to JavaScript Object Notation (JSON) data structures. It supports custom CSV column delimiters, custom quote characters and it can skip CSV rows that start with a comment symbol.

If you use headers, then the first CSV row will be used for JSON object keys. The resulting JSON can be indented with spaces, tabs, or can be kept unformatted, which will minify it.