How to convert CSV to JSON and JSON to CSV in your browser

Keep a leading-zero product code as text while converting a standard price to a JSON number.

• Input: CSV with a header
• Output: UTF-8 JSON without BOM
• Structure: list of objects

The code 001 is an identifier, not a quantity.

code,name,price,active
001,Notebook,12.80,true
002,Pen,2.40,false

Standard decimal values become numbers; leading-zero values and true/false text remain strings.

[
  { "code": "001", "name": "Notebook", "price": 12.8, "active": "true" },
  { "code": "002", "name": "Pen", "price": 2.4, "active": "false" }
]

Not every valid JSON document can be arranged as rows and columns.

• Providing a single object or empty array
• Saving JSON in a non-UTF-8 encoding
• Missing adjusted keys for blank or duplicate CSV headers
• Assuming large integers or leading-zero IDs will be ordinary numbers

JSON input is UTF-8 only. CSV output also requires an encoding and delimiter choice.

1. 1Open Character encoding and format conversion, then choose a CSV or JSON file.
2. 2For CSV, verify the input encoding, delimiter, and headers.
3. 3Choose JSON or a CSV format as the output.
4. 4Review the value types chosen automatically for CSV-to-JSON, or the columns and values inside objects for JSON-to-CSV.
5. 5Verify item counts and download. Confirm the formula-risk warning for CSV output when shown.

Use this tool to change the data layout. Use the Excel encoding guide to keep CSV while fixing garbled text.

• Good fit: test data as a list of JSON objects
• Good fit: JSON exports arranged as rows and columns
• Encoding only: use the encoding guide
• Splitting data with several levels into multiple tables is unsupported