CSV to JSON Converter

Convert CSV to JSON in your browser: choose a delimiter, use the first row as a header, and optionally cast numbers and booleans to real JSON types. Quoted fields and commas are handled.

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How it works

Each line becomes a record and each column a field. With a header row, every row turns into an object keyed by the column names; without one you get an array of arrays. Quoted fields are supported, so values can safely contain commas, quotes and line breaks. Optionally, numbers and true/false are converted to real JSON types.

Your data is parsed in your browser, nothing is uploaded.

What this does

This converter turns CSV into JSON, choosing a delimiter, using the first row as a header, and optionally casting numbers and booleans to real JSON types.

How to use it

  1. Paste your CSV.
  2. Pick the delimiter.
  3. Toggle header row and type casting.
  4. Copy the JSON.

How it works

Values wrapped in quotes can contain commas, quotes and line breaks per standard CSV rules. With a header row each line becomes an object keyed by the column names; without one you get an array of arrays.

Example

A two-column CSV with a header row becomes an array of objects like {"name":"A","age":30}.

Sources & methodology

Last updated .

Frequently asked questions

Does it handle quoted fields and commas?

Yes. Values wrapped in quotes can safely contain commas, quotes and line breaks, following standard CSV rules.

What does the header option do?

With a header row each line becomes an object keyed by the column names; without one you get an array of arrays.

Can it convert numbers and booleans?

Yes. Turn on type conversion and values like 42 and true become real JSON numbers and booleans instead of strings.