CSV to JSON tools are software programs or online services that convert CSV (Comma Separated Values) formatted data into JSON (JavaScript Object Notation) formatted data. CSV is a plain text format used for storing and exchanging tabular data, while JSON is a lightweight data-interchange format commonly used for web applications.

These tools typically offer a user-friendly interface or command-line interface where users can upload or input CSV data, and then choose to convert it to JSON format. The resulting JSON data can then be downloaded or saved to a file.

Some CSV to JSON tools may offer additional features such as the ability to customize the conversion process by specifying field delimiters, headers, and other parameters. They may also support batch conversion of multiple CSV files at once.

CSV to JSON tools are useful for developers and data analysts who need to work with CSV or JSON data in their projects or workflows. They can save time and reduce errors by automating the conversion process, and make it easier to work with data in different formats.