CSV to JSON Converter
Paste CSV data and get pretty-printed JSON — supports delimiters, header toggle, and value trimming
Examples
CSV with headers → array of objects
name,age,city
Alice,30,New York
Bob,25,Boston
// Output:
[
{ "name": "Alice", "age": "30", "city": "New York" },
{ "name": "Bob", "age": "25", "city": "Boston" }
]With the 'First row is header' toggle on, each subsequent row maps to a JSON object whose keys come from the header row.
Headerless CSV → array of arrays
Alice,30,New York
Bob,25,Boston
// Output:
[
["Alice", "30", "New York"],
["Bob", "25", "Boston"]
]With headers disabled, every row becomes a plain array of strings, preserving the original column order.
Details
This tool uses the PapaParse library to reliably parse CSV text in your browser. When 'First row is header' is enabled, each data row becomes a JSON object keyed by the header names. When disabled, rows become plain arrays. Auto-delimiter detection picks the right separator automatically, or you can force comma, semicolon, or tab. The trim option strips leading and trailing whitespace from every value before serialisation. All processing happens locally — your data never leaves your browser.
About this tool
Convert CSV to JSON instantly with custom delimiters and header options. Free online CSV to JSON converter — no signup, data stays in your browser. CSV to JSON Converter runs in the browser on DevTools. There is no signup, and your input stays on this device unless the tool explicitly performs a live network lookup.
What this tool does not do
- CSV to JSON Converter is a free in-browser utility, not a hosted API. It does not keep server-side history and is not a substitute for production verification in your own stack.
How do I use this tool?
How do I use CSV to JSON Converter?
Open CSV to JSON Converter, enter or paste your input, and copy the result. The page works without an account.
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