Before you start
- Keep a small original sample and decide the required delimiter, schema, or output format.
- Remove credentials and personal data that are not needed for the conversion.
MV ToolsText tool
CSV to JSON and JSON to CSV Converter
Convert CSV to JSON and JSON arrays back to CSV directly in your browser with delimiter and header options.
Convert tabular data with schema review
Test a small representative sample first, then compare headers, delimiters, quotes, and values before exporting the complete result.
- Runs locally in the browser with a 2 MB input limit; choose comma, semicolon, tab, or pipe as the delimiter.
- CSV to JSON can use the first row as headers, skip empty lines, and format JSON. Values remain text rather than being guessed as numbers or booleans.
- JSON to CSV accepts one object or an array of objects and collects top-level fields from all rows. Nested objects and arrays need a deliberate representation before export.
Input, output, copying, and download data URLs stay in your browser; they are not uploaded to MV Tools.
How to Convert CSV, JSON, and YAML Data SafelyReview structured data before reuse
Check the result
- Parse the output again and compare headers, empty fields, dates, decimal values, and leading zeroes.
- Use a representative record in the destination system before importing a full file.
Know the limit: A valid format can still contain wrong business values; conversion cannot infer your intended schema or meaning.
CSV to JSON and JSON to CSV Converter
Convert CSV to JSON and JSON arrays back to CSV locally with delimiter, header row, empty-line, and CSV escaping options.
What This Tool Does
This browser-based converter uses Papa Parse to handle commas, semicolons, tabs, pipes, quoted fields, embedded commas, embedded newlines, and CSV escaping while converting between CSV and JSON formats.
Common Use Cases
- Converting spreadsheet CSV exports into JSON for APIs or tests
- Turning JSON arrays of objects into CSV for reports or tables
- Cleaning up CSV, JSON, and delimiter-separated data during development and debugging
How Data Is Handled
CSV and JSON conversion runs locally in your browser. Your data is not uploaded to the backend.
FAQ
Does it support quoted CSV fields?
Yes. The tool uses Papa Parse, which supports quoted fields, embedded commas, and embedded newlines.
What JSON shape is supported for JSON to CSV?
Use an array of objects. A single object is also accepted and converted into one row.
Is my CSV or JSON uploaded?
No. Conversion runs locally in your browser.