Paste your CSV or JSON data below and convert it instantly in either direction. Everything runs in your browser — your data is never uploaded anywhere.
What is a CSV to JSON Converter?
This tool converts data between CSV (Comma-Separated Values) format — commonly used in spreadsheets — and JSON (JavaScript Object Notation) format — commonly used in web applications and APIs. It works in both directions from the same page.
How to Use the CSV/JSON Converter
- Paste your CSV or JSON data into the input box.
- Click “CSV → JSON” or “JSON → CSV” depending on which direction you need.
- Review the result in the output box, then click “Download Result” to save it as a file, or copy it directly.
FAQs
What format should my CSV file use?
The first row should be column headers, with each subsequent row representing one record. Fields containing commas or line breaks should be wrapped in double quotes — this is standard CSV formatting and our tool handles it correctly.
What if my JSON isn’t an array of objects?
The converter expects a JSON array of objects (each object becomes one CSV row) or a single JSON object (converted to a one-row CSV). Deeply nested JSON structures may not flatten cleanly into CSV — consider simplifying nested data first.
Is there a file size limit?
Since conversion happens in your browser rather than on a server, very large files (tens of thousands of rows) may take a moment longer to process, but there’s no hard file size limit imposed by the tool itself.
Does this tool store or see my data?
No. All parsing and conversion happens locally in your browser using JavaScript — your data is never transmitted to our server.
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