CSV to JSON / JSON to CSV
Convert structured data between CSV and JSON in a browser.
Runs 100% in your browser — nothing is uploaded
Convert CSV to JSON, or JSON to CSV, with delimiter selection, header handling, and pasted text or file upload support. Perfect for exports, API payloads, spreadsheets, and quick data conversion tasks that need to stay local.
How to use csv to json / json to csv
- Open the tool and provide the text, number, date, or file it asks for.
- Choose the format, mode, or settings that match the result you need.
- Review the result in the preview or output area.
- Copy the answer or download the finished file when it looks right.
Frequently asked questions
Does it handle CSV headers?
Yes. Toggle the header option to treat the first row as field names when converting CSV to JSON.
What about missing or malformed data?
The parser keeps the values it can read and surfaces an error if the JSON or CSV structure is invalid or inconsistent.
Is the data uploaded?
No. Parsing and conversion happen locally in your browser; nothing is sent to a server.
Can I convert JSON arrays to CSV?
Yes. The tool accepts JSON arrays of objects and exports them as a CSV table with column names from the object keys.
Related tools
Handy companions people often use alongside CSV to JSON / JSON to CSV.