— Data & developer

CSV to JSON Converter

Paste CSV or drop a file and get a clean JSON array of objects — quoted fields, custom delimiters, headers and type inference, all in your browser.

Drop a file here or click to choose — it never leaves your browser
— What it does

The CSV to JSON Converter is a free tool that turns comma-separated values into a pretty-printed JSON array of objects. It uses a proper CSV parser that understands quoted fields, doubled-quote escaping, and commas or line breaks inside quotes, then lets you choose a delimiter, use the first row as keys, trim whitespace, and infer numbers, booleans and nulls — all locally in your browser.

  • Real CSV parsing — handles quoted fields, escaped quotes, and commas or newlines inside quotes.
  • Comma, semicolon or tab delimiters, with first-row-as-header on or off.
  • Optional type inference turns numbers, true/false and empty cells into real JSON values.
  • Runs entirely in your browser — your CSV is never uploaded to a server.

How to use it

1

Paste or drop your CSV

Paste CSV text into the input box, or drop a .csv file — it is read locally and never uploaded.

2

Pick your options

Choose the delimiter, whether the first row is a header, and whether to trim values and infer types.

3

Copy or download the JSON

The JSON array updates as you type. Copy it to the clipboard or download it as a .json file.

Frequently asked

Does this handle commas inside quoted fields?
Yes. The parser follows the standard CSV rules: a field wrapped in double quotes can contain commas, line breaks, and escaped quotes written as two double quotes ("") in a row. Those are not treated as delimiters.
What does “infer types” do?
With type inference on, cells that look like numbers become JSON numbers, true and false become booleans, and empty cells become null. Turn it off to keep every value as a string.
What if my file has no header row?
Uncheck “first row is header” and each column is named col1, col2, col3 and so on. The first row is then treated as data instead of keys.
Is my CSV uploaded anywhere?
No. The conversion runs entirely in your browser with JavaScript, and dropped files are read locally with the FileReader API. Your data is never sent to a server, so it is safe for sensitive exports.

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CSV to Markdown Table

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← All free tools

— Built by saavos

These tools are free. So is the first version of your agent.

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