Objects or arrays
Create an array of objects for named fields or an array of arrays for positional data.
CSV to JSON Converter Online
Convert pasted CSV data or a .csv file into a JSON array of objects or arrays. Quoted fields and common delimiters are handled locally.
CSV and TSV files stay on this device.
Free CSV to JSON converter
Turn rows into API-ready JSON.
Use the header row as object keys or convert each record into a JSON array. The converter understands commas, tabs, semicolons, pipes, quoted commas, escaped quotes, and embedded line breaks.
Upload or paste
Open a CSV or TSV file, or paste data directly when you need a quick conversion.
Private in-browser conversion
Your CSV is parsed and converted on your device; it is not uploaded to TextLumo.
Worked example
See CSV to JSON in action.
Convert CSV to JSON online with header, delimiter, object, and array options.
name,role Ada,Engineer Lin,Designer
[
{ "name": "Ada", "role": "Engineer" },
{ "name": "Lin", "role": "Designer" }
]Real questions, clear answers
CSV to JSON FAQ
How do I convert CSV to JSON?
Paste CSV data or choose a .csv file, confirm the delimiter and header options, then copy or download the generated JSON.
Can the converter create JSON objects or arrays?
Yes. Use Array of objects when the first CSV row contains unique column names, or Array of arrays when you want positional values.
Does CSV to JSON preserve leading zeros?
Yes. CSV fields remain strings, so values such as 00123 and 1.00 are not automatically converted to numbers.
Are CSV files uploaded?
No. Parsing and conversion happen locally in your browser, and TextLumo does not receive the file or its contents.