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CSV to JSON with Headers

This is the most common CSV → JSON shape: the first row becomes the keys and every following row becomes an object. Pick “Is the header (keys)” below and paste your CSV.

CSV input
JSON output

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What “with headers” means

When you convert CSV to JSON with headers, the first row of the file is treated as the key names, and each subsequent row becomes a JSON object. For a file like: 

name,age,city
Ada,36,London
Grace,45,New York

the output is:

[
  { "name": "Ada", "age": "36", "city": "London" },
  { "name": "Grace", "age": "45", "city": "New York" }
]

Headers vs. no headers

  • First row is the header — output is an array of objects keyed by column names. Use this when your CSV has a header row.
  • No header — output is an array of arrays, keeping every row as data. Use this for headerless exports.

Tips

  • Keep header names unique and non-empty; blank headers become column_1, column_2, …
  • Spaces around header names are trimmed automatically.
  • Values stay as strings — cast to numbers in your code where it matters.
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