CSV is a lightweight tabular format used everywhere—from spreadsheets and exports to data pipelines. Converting CSV to JSON makes it easy to work with the data in JavaScript apps and APIs.
How to use the online CSV → JSON tool
- Paste CSV with the first row as headers.
- Click Convert to produce a JSON array.
- Use Copy Output to copy the JSON to your clipboard.
- All parsing happens locally in your browser—data never leaves your device.
- Open the CSV → JSON tool
Examples
Input CSV
name,age,city Alice,29,Paris Bob,34,"New York" "Charlie, Jr.",22,London
Output JSON
[
{"name":"Alice","age":"29","city":"Paris"},
{"name":"Bob","age":"34","city":"New York"},
{"name":"Charlie, Jr.","age":"22","city":"London"}
]
Best practices
- Headers as keys: First row becomes object keys—make them descriptive and machine-friendly.
- Quotes/escaping: Wrap fields containing commas in double quotes; escape double quotes
inside a field with
"". - Type conversion: CSV is text. Convert strings to numbers/booleans/dates in your app if needed.
- Line endings: Handle both Windows (\r\n) and Unix (\n) line breaks.
- Consistency: Keep column order and presence consistent across rows.
Common pitfalls
- Missing headers—add a header row before converting.
- Unbalanced quotes—ensure quoted fields open and close correctly.
- Trailing commas—remove extra commas at the end of lines.
FAQs
Does the tool upload my data?
No. Everything runs 100% in your browser.
Can I convert very large CSV files?
Large files may be limited by browser memory/performance. For huge datasets, consider chunked processing or server-side scripts.
How can I turn numeric fields into numbers?
Parse them in your code after conversion (e.g., Number(value) or JSON schema validation).
Are embedded commas and quotes supported?
Yes. Quoted fields may contain commas; double quotes are escaped with "".
Try it now: CSV → JSON