How to use CSV to JSON Converter
- Paste comma-separated CSV, including its first row.
- Leave the header option checked if the first row contains column names. Otherwise uncheck it to produce arrays of cells.
- Select Convert, inspect the formatted JSON, and copy or download it.
A closer look
CSV is more than a list split at commas. Quoted fields can contain commas, doubled quote marks, and even line breaks. This converter uses Papa Parse to read that structure, including Windows and Unix line endings. With the header option on, each data row becomes an object whose keys come from the first row. Without a header, rows become arrays. All cells remain strings so a postal code such as 00123 does not lose its leading zeros. Duplicate or empty headers and inconsistent row widths produce clear errors.
A practical example
Use name,city as headers and Sam,Paris as a row to create an object with name and city fields. Keep quotes around a field containing a comma.
A useful tip
The tool assumes the first row is a header by default because header detection is inherently ambiguous. Check that row yourself. Semicolon- or tab-separated files need a comma-separated export before using this tool.
Good questions. Simple answers.
Why is 25 shown as "25" in JSON?
CSV has no reliable type system. Keeping cells as text avoids guessing whether values are numbers, identifiers, dates, or codes.
What happens to empty cells?
They become empty strings. A trailing line ending is ignored, but an actual blank row is retained or reported if it has an inconsistent number of columns.
Explore all developer tools for related tasks and category-specific guidance, or read how Toolzafi handles your data.